diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index 53f2ae1..4702b5b 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -227,15 +227,15 @@
                     shader = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
 
                     filter.glShaders[renderer.CONTEXT_UID] = this.shaderCache[filter.glShaderKey] = shader;
+                    this.managedFilters.push(filter);
                 }
             }
             else
             {
                 shader = filter.glShaders[renderer.CONTEXT_UID] = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
+                this.managedFilters.push(filter);
             }
 
-            this.managedFilters.push(filter);
-
             // TODO - this only needs to be done once?
             renderer.bindVao(null);
 

diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index 53f2ae1..4702b5b 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -227,15 +227,15 @@
                     shader = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
 
                     filter.glShaders[renderer.CONTEXT_UID] = this.shaderCache[filter.glShaderKey] = shader;
+                    this.managedFilters.push(filter);
                 }
             }
             else
             {
                 shader = filter.glShaders[renderer.CONTEXT_UID] = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
+                this.managedFilters.push(filter);
             }
 
-            this.managedFilters.push(filter);
-
             // TODO - this only needs to be done once?
             renderer.bindVao(null);
 
diff --git a/src/core/sprites/webgl/SpriteRenderer.js b/src/core/sprites/webgl/SpriteRenderer.js
index 8fd44c1..9f2dda1 100644
--- a/src/core/sprites/webgl/SpriteRenderer.js
+++ b/src/core/sprites/webgl/SpriteRenderer.js
@@ -241,9 +241,19 @@
         // copy textures..
         for (i = 0; i < MAX_TEXTURES; ++i)
         {
-            boundTextures[i] = rendererBoundTextures[i];
-            boundTextures[i]._virtalBoundId = i;
+            const bt = rendererBoundTextures[i];
+
+            if (bt._enabled === TICK)
+            {
+                boundTextures[i] = this.renderer.emptyTextures[i];
+                continue;
+            }
+
+            boundTextures[i] = bt;
+            bt._virtalBoundId = i;
+            bt._enabled = TICK;
         }
+        TICK++;
 
         for (i = 0; i < this.currentIndex; ++i)
         {

diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index 53f2ae1..4702b5b 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -227,15 +227,15 @@
                     shader = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
 
                     filter.glShaders[renderer.CONTEXT_UID] = this.shaderCache[filter.glShaderKey] = shader;
+                    this.managedFilters.push(filter);
                 }
             }
             else
             {
                 shader = filter.glShaders[renderer.CONTEXT_UID] = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
+                this.managedFilters.push(filter);
             }
 
-            this.managedFilters.push(filter);
-
             // TODO - this only needs to be done once?
             renderer.bindVao(null);
 
diff --git a/src/core/sprites/webgl/SpriteRenderer.js b/src/core/sprites/webgl/SpriteRenderer.js
index 8fd44c1..9f2dda1 100644
--- a/src/core/sprites/webgl/SpriteRenderer.js
+++ b/src/core/sprites/webgl/SpriteRenderer.js
@@ -241,9 +241,19 @@
         // copy textures..
         for (i = 0; i < MAX_TEXTURES; ++i)
         {
-            boundTextures[i] = rendererBoundTextures[i];
-            boundTextures[i]._virtalBoundId = i;
+            const bt = rendererBoundTextures[i];
+
+            if (bt._enabled === TICK)
+            {
+                boundTextures[i] = this.renderer.emptyTextures[i];
+                continue;
+            }
+
+            boundTextures[i] = bt;
+            bt._virtalBoundId = i;
+            bt._enabled = TICK;
         }
+        TICK++;
 
         for (i = 0; i < this.currentIndex; ++i)
         {
diff --git a/src/core/text/TextMetrics.js b/src/core/text/TextMetrics.js
index c4f32e1..904f4e6 100644
--- a/src/core/text/TextMetrics.js
+++ b/src/core/text/TextMetrics.js
@@ -106,6 +106,7 @@
         // Greedy wrapping algorithm that will wrap words as the line grows longer
         // than its horizontal bounds.
         let result = '';
+        const firstChar = text.charAt(0);
         const lines = text.split('\n');
         const wordWrapWidth = style.wordWrapWidth;
         const characterCache = {};
@@ -142,7 +143,7 @@
                         }
                         else
                         {
-                            if (c === 0)
+                            if (c === 0 && (j > 0 || firstChar === ' '))
                             {
                                 result += ' ';
                             }

diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index 53f2ae1..4702b5b 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -227,15 +227,15 @@
                     shader = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
 
                     filter.glShaders[renderer.CONTEXT_UID] = this.shaderCache[filter.glShaderKey] = shader;
+                    this.managedFilters.push(filter);
                 }
             }
             else
             {
                 shader = filter.glShaders[renderer.CONTEXT_UID] = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
+                this.managedFilters.push(filter);
             }
 
-            this.managedFilters.push(filter);
-
             // TODO - this only needs to be done once?
             renderer.bindVao(null);
 
diff --git a/src/core/sprites/webgl/SpriteRenderer.js b/src/core/sprites/webgl/SpriteRenderer.js
index 8fd44c1..9f2dda1 100644
--- a/src/core/sprites/webgl/SpriteRenderer.js
+++ b/src/core/sprites/webgl/SpriteRenderer.js
@@ -241,9 +241,19 @@
         // copy textures..
         for (i = 0; i < MAX_TEXTURES; ++i)
         {
-            boundTextures[i] = rendererBoundTextures[i];
-            boundTextures[i]._virtalBoundId = i;
+            const bt = rendererBoundTextures[i];
+
+            if (bt._enabled === TICK)
+            {
+                boundTextures[i] = this.renderer.emptyTextures[i];
+                continue;
+            }
+
+            boundTextures[i] = bt;
+            bt._virtalBoundId = i;
+            bt._enabled = TICK;
         }
+        TICK++;
 
         for (i = 0; i < this.currentIndex; ++i)
         {
diff --git a/src/core/text/TextMetrics.js b/src/core/text/TextMetrics.js
index c4f32e1..904f4e6 100644
--- a/src/core/text/TextMetrics.js
+++ b/src/core/text/TextMetrics.js
@@ -106,6 +106,7 @@
         // Greedy wrapping algorithm that will wrap words as the line grows longer
         // than its horizontal bounds.
         let result = '';
+        const firstChar = text.charAt(0);
         const lines = text.split('\n');
         const wordWrapWidth = style.wordWrapWidth;
         const characterCache = {};
@@ -142,7 +143,7 @@
                         }
                         else
                         {
-                            if (c === 0)
+                            if (c === 0 && (j > 0 || firstChar === ' '))
                             {
                                 result += ' ';
                             }
diff --git a/src/core/text/TextStyle.js b/src/core/text/TextStyle.js
index c682a36..c7ab5c2 100644
--- a/src/core/text/TextStyle.js
+++ b/src/core/text/TextStyle.js
@@ -75,7 +75,8 @@
      * @param {number} [style.letterSpacing=0] - The amount of spacing between letters, default is 0
      * @param {number} [style.lineHeight] - The line height, a number that represents the vertical space that a letter uses
      * @param {string} [style.lineJoin='miter'] - The lineJoin property sets the type of corner created, it can resolve
-     *      spiked text issues. Default is 'miter' (creates a sharp corner).
+     *      spiked text issues. Possible values "miter" (creates a sharp corner), "round" (creates a round corner) or "bevel"
+     *      (creates a squared corner).
      * @param {number} [style.miterLimit=10] - The miter limit to use when using the 'miter' lineJoin mode. This can reduce
      *      or increase the spikiness of rendered text.
      * @param {number} [style.padding=0] - Occasionally some fonts are cropped. Adding some padding will prevent this from
@@ -93,7 +94,9 @@
     {
         this.styleID = 0;
 
-        Object.assign(this, defaultStyle, style);
+        this.reset();
+
+        deepCopyProperties(this, style, style);
     }
 
     /**
@@ -106,10 +109,7 @@
     {
         const clonedProperties = {};
 
-        for (const key in defaultStyle)
-        {
-            clonedProperties[key] = this[key];
-        }
+        deepCopyProperties(clonedProperties, this, defaultStyle);
 
         return new TextStyle(clonedProperties);
     }
@@ -119,7 +119,7 @@
      */
     reset()
     {
-        Object.assign(this, defaultStyle);
+        deepCopyProperties(this, defaultStyle, defaultStyle);
     }
 
     /**
@@ -755,3 +755,20 @@
 
     return true;
 }
+
+/**
+ * Utility function to ensure that object properties are copied by value, and not by reference
+ *
+ * @param {Object} target Target object to copy properties into
+ * @param {Object} source Source object for the proporties to copy
+ * @param {string} propertyObj Object containing properties names we want to loop over
+ */
+function deepCopyProperties(target, source, propertyObj) {
+    for (const prop in propertyObj) {
+        if (Array.isArray(source[prop])) {
+            target[prop] = source[prop].slice();
+        } else {
+            target[prop] = source[prop];
+        }
+    }
+}

diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index 53f2ae1..4702b5b 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -227,15 +227,15 @@
                     shader = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
 
                     filter.glShaders[renderer.CONTEXT_UID] = this.shaderCache[filter.glShaderKey] = shader;
+                    this.managedFilters.push(filter);
                 }
             }
             else
             {
                 shader = filter.glShaders[renderer.CONTEXT_UID] = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
+                this.managedFilters.push(filter);
             }
 
-            this.managedFilters.push(filter);
-
             // TODO - this only needs to be done once?
             renderer.bindVao(null);
 
diff --git a/src/core/sprites/webgl/SpriteRenderer.js b/src/core/sprites/webgl/SpriteRenderer.js
index 8fd44c1..9f2dda1 100644
--- a/src/core/sprites/webgl/SpriteRenderer.js
+++ b/src/core/sprites/webgl/SpriteRenderer.js
@@ -241,9 +241,19 @@
         // copy textures..
         for (i = 0; i < MAX_TEXTURES; ++i)
         {
-            boundTextures[i] = rendererBoundTextures[i];
-            boundTextures[i]._virtalBoundId = i;
+            const bt = rendererBoundTextures[i];
+
+            if (bt._enabled === TICK)
+            {
+                boundTextures[i] = this.renderer.emptyTextures[i];
+                continue;
+            }
+
+            boundTextures[i] = bt;
+            bt._virtalBoundId = i;
+            bt._enabled = TICK;
         }
+        TICK++;
 
         for (i = 0; i < this.currentIndex; ++i)
         {
diff --git a/src/core/text/TextMetrics.js b/src/core/text/TextMetrics.js
index c4f32e1..904f4e6 100644
--- a/src/core/text/TextMetrics.js
+++ b/src/core/text/TextMetrics.js
@@ -106,6 +106,7 @@
         // Greedy wrapping algorithm that will wrap words as the line grows longer
         // than its horizontal bounds.
         let result = '';
+        const firstChar = text.charAt(0);
         const lines = text.split('\n');
         const wordWrapWidth = style.wordWrapWidth;
         const characterCache = {};
@@ -142,7 +143,7 @@
                         }
                         else
                         {
-                            if (c === 0)
+                            if (c === 0 && (j > 0 || firstChar === ' '))
                             {
                                 result += ' ';
                             }
diff --git a/src/core/text/TextStyle.js b/src/core/text/TextStyle.js
index c682a36..c7ab5c2 100644
--- a/src/core/text/TextStyle.js
+++ b/src/core/text/TextStyle.js
@@ -75,7 +75,8 @@
      * @param {number} [style.letterSpacing=0] - The amount of spacing between letters, default is 0
      * @param {number} [style.lineHeight] - The line height, a number that represents the vertical space that a letter uses
      * @param {string} [style.lineJoin='miter'] - The lineJoin property sets the type of corner created, it can resolve
-     *      spiked text issues. Default is 'miter' (creates a sharp corner).
+     *      spiked text issues. Possible values "miter" (creates a sharp corner), "round" (creates a round corner) or "bevel"
+     *      (creates a squared corner).
      * @param {number} [style.miterLimit=10] - The miter limit to use when using the 'miter' lineJoin mode. This can reduce
      *      or increase the spikiness of rendered text.
      * @param {number} [style.padding=0] - Occasionally some fonts are cropped. Adding some padding will prevent this from
@@ -93,7 +94,9 @@
     {
         this.styleID = 0;
 
-        Object.assign(this, defaultStyle, style);
+        this.reset();
+
+        deepCopyProperties(this, style, style);
     }
 
     /**
@@ -106,10 +109,7 @@
     {
         const clonedProperties = {};
 
-        for (const key in defaultStyle)
-        {
-            clonedProperties[key] = this[key];
-        }
+        deepCopyProperties(clonedProperties, this, defaultStyle);
 
         return new TextStyle(clonedProperties);
     }
@@ -119,7 +119,7 @@
      */
     reset()
     {
-        Object.assign(this, defaultStyle);
+        deepCopyProperties(this, defaultStyle, defaultStyle);
     }
 
     /**
@@ -755,3 +755,20 @@
 
     return true;
 }
+
+/**
+ * Utility function to ensure that object properties are copied by value, and not by reference
+ *
+ * @param {Object} target Target object to copy properties into
+ * @param {Object} source Source object for the proporties to copy
+ * @param {string} propertyObj Object containing properties names we want to loop over
+ */
+function deepCopyProperties(target, source, propertyObj) {
+    for (const prop in propertyObj) {
+        if (Array.isArray(source[prop])) {
+            target[prop] = source[prop].slice();
+        } else {
+            target[prop] = source[prop];
+        }
+    }
+}
diff --git a/src/core/textures/BaseTexture.js b/src/core/textures/BaseTexture.js
index 0d223a8..df904bb 100644
--- a/src/core/textures/BaseTexture.js
+++ b/src/core/textures/BaseTexture.js
@@ -736,7 +736,9 @@
 
     /**
      * Helper function that creates a base texture based on the source you provide.
-     * The source can be - image url, image element, canvas element.
+     * The source can be - image url, image element, canvas element. If the
+     * source is an image url or an image element and not in the base texture
+     * cache, it will be created and loaded.
      *
      * @static
      * @param {string|HTMLImageElement|HTMLCanvasElement} source - The source to create base texture from.

diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index 53f2ae1..4702b5b 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -227,15 +227,15 @@
                     shader = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
 
                     filter.glShaders[renderer.CONTEXT_UID] = this.shaderCache[filter.glShaderKey] = shader;
+                    this.managedFilters.push(filter);
                 }
             }
             else
             {
                 shader = filter.glShaders[renderer.CONTEXT_UID] = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
+                this.managedFilters.push(filter);
             }
 
-            this.managedFilters.push(filter);
-
             // TODO - this only needs to be done once?
             renderer.bindVao(null);
 
diff --git a/src/core/sprites/webgl/SpriteRenderer.js b/src/core/sprites/webgl/SpriteRenderer.js
index 8fd44c1..9f2dda1 100644
--- a/src/core/sprites/webgl/SpriteRenderer.js
+++ b/src/core/sprites/webgl/SpriteRenderer.js
@@ -241,9 +241,19 @@
         // copy textures..
         for (i = 0; i < MAX_TEXTURES; ++i)
         {
-            boundTextures[i] = rendererBoundTextures[i];
-            boundTextures[i]._virtalBoundId = i;
+            const bt = rendererBoundTextures[i];
+
+            if (bt._enabled === TICK)
+            {
+                boundTextures[i] = this.renderer.emptyTextures[i];
+                continue;
+            }
+
+            boundTextures[i] = bt;
+            bt._virtalBoundId = i;
+            bt._enabled = TICK;
         }
+        TICK++;
 
         for (i = 0; i < this.currentIndex; ++i)
         {
diff --git a/src/core/text/TextMetrics.js b/src/core/text/TextMetrics.js
index c4f32e1..904f4e6 100644
--- a/src/core/text/TextMetrics.js
+++ b/src/core/text/TextMetrics.js
@@ -106,6 +106,7 @@
         // Greedy wrapping algorithm that will wrap words as the line grows longer
         // than its horizontal bounds.
         let result = '';
+        const firstChar = text.charAt(0);
         const lines = text.split('\n');
         const wordWrapWidth = style.wordWrapWidth;
         const characterCache = {};
@@ -142,7 +143,7 @@
                         }
                         else
                         {
-                            if (c === 0)
+                            if (c === 0 && (j > 0 || firstChar === ' '))
                             {
                                 result += ' ';
                             }
diff --git a/src/core/text/TextStyle.js b/src/core/text/TextStyle.js
index c682a36..c7ab5c2 100644
--- a/src/core/text/TextStyle.js
+++ b/src/core/text/TextStyle.js
@@ -75,7 +75,8 @@
      * @param {number} [style.letterSpacing=0] - The amount of spacing between letters, default is 0
      * @param {number} [style.lineHeight] - The line height, a number that represents the vertical space that a letter uses
      * @param {string} [style.lineJoin='miter'] - The lineJoin property sets the type of corner created, it can resolve
-     *      spiked text issues. Default is 'miter' (creates a sharp corner).
+     *      spiked text issues. Possible values "miter" (creates a sharp corner), "round" (creates a round corner) or "bevel"
+     *      (creates a squared corner).
      * @param {number} [style.miterLimit=10] - The miter limit to use when using the 'miter' lineJoin mode. This can reduce
      *      or increase the spikiness of rendered text.
      * @param {number} [style.padding=0] - Occasionally some fonts are cropped. Adding some padding will prevent this from
@@ -93,7 +94,9 @@
     {
         this.styleID = 0;
 
-        Object.assign(this, defaultStyle, style);
+        this.reset();
+
+        deepCopyProperties(this, style, style);
     }
 
     /**
@@ -106,10 +109,7 @@
     {
         const clonedProperties = {};
 
-        for (const key in defaultStyle)
-        {
-            clonedProperties[key] = this[key];
-        }
+        deepCopyProperties(clonedProperties, this, defaultStyle);
 
         return new TextStyle(clonedProperties);
     }
@@ -119,7 +119,7 @@
      */
     reset()
     {
-        Object.assign(this, defaultStyle);
+        deepCopyProperties(this, defaultStyle, defaultStyle);
     }
 
     /**
@@ -755,3 +755,20 @@
 
     return true;
 }
+
+/**
+ * Utility function to ensure that object properties are copied by value, and not by reference
+ *
+ * @param {Object} target Target object to copy properties into
+ * @param {Object} source Source object for the proporties to copy
+ * @param {string} propertyObj Object containing properties names we want to loop over
+ */
+function deepCopyProperties(target, source, propertyObj) {
+    for (const prop in propertyObj) {
+        if (Array.isArray(source[prop])) {
+            target[prop] = source[prop].slice();
+        } else {
+            target[prop] = source[prop];
+        }
+    }
+}
diff --git a/src/core/textures/BaseTexture.js b/src/core/textures/BaseTexture.js
index 0d223a8..df904bb 100644
--- a/src/core/textures/BaseTexture.js
+++ b/src/core/textures/BaseTexture.js
@@ -736,7 +736,9 @@
 
     /**
      * Helper function that creates a base texture based on the source you provide.
-     * The source can be - image url, image element, canvas element.
+     * The source can be - image url, image element, canvas element. If the
+     * source is an image url or an image element and not in the base texture
+     * cache, it will be created and loaded.
      *
      * @static
      * @param {string|HTMLImageElement|HTMLCanvasElement} source - The source to create base texture from.
diff --git a/src/core/textures/VideoBaseTexture.js b/src/core/textures/VideoBaseTexture.js
index 86f0873..2e7719b 100644
--- a/src/core/textures/VideoBaseTexture.js
+++ b/src/core/textures/VideoBaseTexture.js
@@ -196,6 +196,10 @@
         {
             BaseTexture.removeFromCache(this.source._pixiId);
             delete this.source._pixiId;
+
+            this.source.pause();
+            this.source.src = '';
+            this.source.load();
         }
 
         super.destroy();

diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index 53f2ae1..4702b5b 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -227,15 +227,15 @@
                     shader = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
 
                     filter.glShaders[renderer.CONTEXT_UID] = this.shaderCache[filter.glShaderKey] = shader;
+                    this.managedFilters.push(filter);
                 }
             }
             else
             {
                 shader = filter.glShaders[renderer.CONTEXT_UID] = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
+                this.managedFilters.push(filter);
             }
 
-            this.managedFilters.push(filter);
-
             // TODO - this only needs to be done once?
             renderer.bindVao(null);
 
diff --git a/src/core/sprites/webgl/SpriteRenderer.js b/src/core/sprites/webgl/SpriteRenderer.js
index 8fd44c1..9f2dda1 100644
--- a/src/core/sprites/webgl/SpriteRenderer.js
+++ b/src/core/sprites/webgl/SpriteRenderer.js
@@ -241,9 +241,19 @@
         // copy textures..
         for (i = 0; i < MAX_TEXTURES; ++i)
         {
-            boundTextures[i] = rendererBoundTextures[i];
-            boundTextures[i]._virtalBoundId = i;
+            const bt = rendererBoundTextures[i];
+
+            if (bt._enabled === TICK)
+            {
+                boundTextures[i] = this.renderer.emptyTextures[i];
+                continue;
+            }
+
+            boundTextures[i] = bt;
+            bt._virtalBoundId = i;
+            bt._enabled = TICK;
         }
+        TICK++;
 
         for (i = 0; i < this.currentIndex; ++i)
         {
diff --git a/src/core/text/TextMetrics.js b/src/core/text/TextMetrics.js
index c4f32e1..904f4e6 100644
--- a/src/core/text/TextMetrics.js
+++ b/src/core/text/TextMetrics.js
@@ -106,6 +106,7 @@
         // Greedy wrapping algorithm that will wrap words as the line grows longer
         // than its horizontal bounds.
         let result = '';
+        const firstChar = text.charAt(0);
         const lines = text.split('\n');
         const wordWrapWidth = style.wordWrapWidth;
         const characterCache = {};
@@ -142,7 +143,7 @@
                         }
                         else
                         {
-                            if (c === 0)
+                            if (c === 0 && (j > 0 || firstChar === ' '))
                             {
                                 result += ' ';
                             }
diff --git a/src/core/text/TextStyle.js b/src/core/text/TextStyle.js
index c682a36..c7ab5c2 100644
--- a/src/core/text/TextStyle.js
+++ b/src/core/text/TextStyle.js
@@ -75,7 +75,8 @@
      * @param {number} [style.letterSpacing=0] - The amount of spacing between letters, default is 0
      * @param {number} [style.lineHeight] - The line height, a number that represents the vertical space that a letter uses
      * @param {string} [style.lineJoin='miter'] - The lineJoin property sets the type of corner created, it can resolve
-     *      spiked text issues. Default is 'miter' (creates a sharp corner).
+     *      spiked text issues. Possible values "miter" (creates a sharp corner), "round" (creates a round corner) or "bevel"
+     *      (creates a squared corner).
      * @param {number} [style.miterLimit=10] - The miter limit to use when using the 'miter' lineJoin mode. This can reduce
      *      or increase the spikiness of rendered text.
      * @param {number} [style.padding=0] - Occasionally some fonts are cropped. Adding some padding will prevent this from
@@ -93,7 +94,9 @@
     {
         this.styleID = 0;
 
-        Object.assign(this, defaultStyle, style);
+        this.reset();
+
+        deepCopyProperties(this, style, style);
     }
 
     /**
@@ -106,10 +109,7 @@
     {
         const clonedProperties = {};
 
-        for (const key in defaultStyle)
-        {
-            clonedProperties[key] = this[key];
-        }
+        deepCopyProperties(clonedProperties, this, defaultStyle);
 
         return new TextStyle(clonedProperties);
     }
@@ -119,7 +119,7 @@
      */
     reset()
     {
-        Object.assign(this, defaultStyle);
+        deepCopyProperties(this, defaultStyle, defaultStyle);
     }
 
     /**
@@ -755,3 +755,20 @@
 
     return true;
 }
+
+/**
+ * Utility function to ensure that object properties are copied by value, and not by reference
+ *
+ * @param {Object} target Target object to copy properties into
+ * @param {Object} source Source object for the proporties to copy
+ * @param {string} propertyObj Object containing properties names we want to loop over
+ */
+function deepCopyProperties(target, source, propertyObj) {
+    for (const prop in propertyObj) {
+        if (Array.isArray(source[prop])) {
+            target[prop] = source[prop].slice();
+        } else {
+            target[prop] = source[prop];
+        }
+    }
+}
diff --git a/src/core/textures/BaseTexture.js b/src/core/textures/BaseTexture.js
index 0d223a8..df904bb 100644
--- a/src/core/textures/BaseTexture.js
+++ b/src/core/textures/BaseTexture.js
@@ -736,7 +736,9 @@
 
     /**
      * Helper function that creates a base texture based on the source you provide.
-     * The source can be - image url, image element, canvas element.
+     * The source can be - image url, image element, canvas element. If the
+     * source is an image url or an image element and not in the base texture
+     * cache, it will be created and loaded.
      *
      * @static
      * @param {string|HTMLImageElement|HTMLCanvasElement} source - The source to create base texture from.
diff --git a/src/core/textures/VideoBaseTexture.js b/src/core/textures/VideoBaseTexture.js
index 86f0873..2e7719b 100644
--- a/src/core/textures/VideoBaseTexture.js
+++ b/src/core/textures/VideoBaseTexture.js
@@ -196,6 +196,10 @@
         {
             BaseTexture.removeFromCache(this.source._pixiId);
             delete this.source._pixiId;
+
+            this.source.pause();
+            this.source.src = '';
+            this.source.load();
         }
 
         super.destroy();
diff --git a/src/filters/alpha/AlphaFilter.js b/src/filters/alpha/AlphaFilter.js
index c2824ed..4446003 100644
--- a/src/filters/alpha/AlphaFilter.js
+++ b/src/filters/alpha/AlphaFilter.js
@@ -22,9 +22,9 @@
 export default class AlphaFilter extends core.Filter
 {
     /**
-     *
+     * @param {number} [alpha=1] Amount of alpha from 0 to 1, where 0 is transparent
      */
-    constructor()
+    constructor(alpha = 1.0)
     {
         super(
             // vertex shader
@@ -33,7 +33,7 @@
             readFileSync(join(__dirname, './alpha.frag'), 'utf8')
         );
 
-        this.alpha = 1.0;
+        this.alpha = alpha;
         this.glShaderKey = 'alpha';
     }
 

diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index 53f2ae1..4702b5b 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -227,15 +227,15 @@
                     shader = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
 
                     filter.glShaders[renderer.CONTEXT_UID] = this.shaderCache[filter.glShaderKey] = shader;
+                    this.managedFilters.push(filter);
                 }
             }
             else
             {
                 shader = filter.glShaders[renderer.CONTEXT_UID] = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
+                this.managedFilters.push(filter);
             }
 
-            this.managedFilters.push(filter);
-
             // TODO - this only needs to be done once?
             renderer.bindVao(null);
 
diff --git a/src/core/sprites/webgl/SpriteRenderer.js b/src/core/sprites/webgl/SpriteRenderer.js
index 8fd44c1..9f2dda1 100644
--- a/src/core/sprites/webgl/SpriteRenderer.js
+++ b/src/core/sprites/webgl/SpriteRenderer.js
@@ -241,9 +241,19 @@
         // copy textures..
         for (i = 0; i < MAX_TEXTURES; ++i)
         {
-            boundTextures[i] = rendererBoundTextures[i];
-            boundTextures[i]._virtalBoundId = i;
+            const bt = rendererBoundTextures[i];
+
+            if (bt._enabled === TICK)
+            {
+                boundTextures[i] = this.renderer.emptyTextures[i];
+                continue;
+            }
+
+            boundTextures[i] = bt;
+            bt._virtalBoundId = i;
+            bt._enabled = TICK;
         }
+        TICK++;
 
         for (i = 0; i < this.currentIndex; ++i)
         {
diff --git a/src/core/text/TextMetrics.js b/src/core/text/TextMetrics.js
index c4f32e1..904f4e6 100644
--- a/src/core/text/TextMetrics.js
+++ b/src/core/text/TextMetrics.js
@@ -106,6 +106,7 @@
         // Greedy wrapping algorithm that will wrap words as the line grows longer
         // than its horizontal bounds.
         let result = '';
+        const firstChar = text.charAt(0);
         const lines = text.split('\n');
         const wordWrapWidth = style.wordWrapWidth;
         const characterCache = {};
@@ -142,7 +143,7 @@
                         }
                         else
                         {
-                            if (c === 0)
+                            if (c === 0 && (j > 0 || firstChar === ' '))
                             {
                                 result += ' ';
                             }
diff --git a/src/core/text/TextStyle.js b/src/core/text/TextStyle.js
index c682a36..c7ab5c2 100644
--- a/src/core/text/TextStyle.js
+++ b/src/core/text/TextStyle.js
@@ -75,7 +75,8 @@
      * @param {number} [style.letterSpacing=0] - The amount of spacing between letters, default is 0
      * @param {number} [style.lineHeight] - The line height, a number that represents the vertical space that a letter uses
      * @param {string} [style.lineJoin='miter'] - The lineJoin property sets the type of corner created, it can resolve
-     *      spiked text issues. Default is 'miter' (creates a sharp corner).
+     *      spiked text issues. Possible values "miter" (creates a sharp corner), "round" (creates a round corner) or "bevel"
+     *      (creates a squared corner).
      * @param {number} [style.miterLimit=10] - The miter limit to use when using the 'miter' lineJoin mode. This can reduce
      *      or increase the spikiness of rendered text.
      * @param {number} [style.padding=0] - Occasionally some fonts are cropped. Adding some padding will prevent this from
@@ -93,7 +94,9 @@
     {
         this.styleID = 0;
 
-        Object.assign(this, defaultStyle, style);
+        this.reset();
+
+        deepCopyProperties(this, style, style);
     }
 
     /**
@@ -106,10 +109,7 @@
     {
         const clonedProperties = {};
 
-        for (const key in defaultStyle)
-        {
-            clonedProperties[key] = this[key];
-        }
+        deepCopyProperties(clonedProperties, this, defaultStyle);
 
         return new TextStyle(clonedProperties);
     }
@@ -119,7 +119,7 @@
      */
     reset()
     {
-        Object.assign(this, defaultStyle);
+        deepCopyProperties(this, defaultStyle, defaultStyle);
     }
 
     /**
@@ -755,3 +755,20 @@
 
     return true;
 }
+
+/**
+ * Utility function to ensure that object properties are copied by value, and not by reference
+ *
+ * @param {Object} target Target object to copy properties into
+ * @param {Object} source Source object for the proporties to copy
+ * @param {string} propertyObj Object containing properties names we want to loop over
+ */
+function deepCopyProperties(target, source, propertyObj) {
+    for (const prop in propertyObj) {
+        if (Array.isArray(source[prop])) {
+            target[prop] = source[prop].slice();
+        } else {
+            target[prop] = source[prop];
+        }
+    }
+}
diff --git a/src/core/textures/BaseTexture.js b/src/core/textures/BaseTexture.js
index 0d223a8..df904bb 100644
--- a/src/core/textures/BaseTexture.js
+++ b/src/core/textures/BaseTexture.js
@@ -736,7 +736,9 @@
 
     /**
      * Helper function that creates a base texture based on the source you provide.
-     * The source can be - image url, image element, canvas element.
+     * The source can be - image url, image element, canvas element. If the
+     * source is an image url or an image element and not in the base texture
+     * cache, it will be created and loaded.
      *
      * @static
      * @param {string|HTMLImageElement|HTMLCanvasElement} source - The source to create base texture from.
diff --git a/src/core/textures/VideoBaseTexture.js b/src/core/textures/VideoBaseTexture.js
index 86f0873..2e7719b 100644
--- a/src/core/textures/VideoBaseTexture.js
+++ b/src/core/textures/VideoBaseTexture.js
@@ -196,6 +196,10 @@
         {
             BaseTexture.removeFromCache(this.source._pixiId);
             delete this.source._pixiId;
+
+            this.source.pause();
+            this.source.src = '';
+            this.source.load();
         }
 
         super.destroy();
diff --git a/src/filters/alpha/AlphaFilter.js b/src/filters/alpha/AlphaFilter.js
index c2824ed..4446003 100644
--- a/src/filters/alpha/AlphaFilter.js
+++ b/src/filters/alpha/AlphaFilter.js
@@ -22,9 +22,9 @@
 export default class AlphaFilter extends core.Filter
 {
     /**
-     *
+     * @param {number} [alpha=1] Amount of alpha from 0 to 1, where 0 is transparent
      */
-    constructor()
+    constructor(alpha = 1.0)
     {
         super(
             // vertex shader
@@ -33,7 +33,7 @@
             readFileSync(join(__dirname, './alpha.frag'), 'utf8')
         );
 
-        this.alpha = 1.0;
+        this.alpha = alpha;
         this.glShaderKey = 'alpha';
     }
 
diff --git a/src/filters/colormatrix/ColorMatrixFilter.js b/src/filters/colormatrix/ColorMatrixFilter.js
index e1d647a..8ab60d9 100644
--- a/src/filters/colormatrix/ColorMatrixFilter.js
+++ b/src/filters/colormatrix/ColorMatrixFilter.js
@@ -8,7 +8,7 @@
  * with a new set of RGBA color and alpha values. It's pretty powerful!
  *
  * ```js
- *  let colorMatrix = new PIXI.ColorMatrixFilter();
+ *  let colorMatrix = new PIXI.filters.ColorMatrixFilter();
  *  container.filters = [colorMatrix];
  *  colorMatrix.contrast(2);
  * ```

diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index 53f2ae1..4702b5b 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -227,15 +227,15 @@
                     shader = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
 
                     filter.glShaders[renderer.CONTEXT_UID] = this.shaderCache[filter.glShaderKey] = shader;
+                    this.managedFilters.push(filter);
                 }
             }
             else
             {
                 shader = filter.glShaders[renderer.CONTEXT_UID] = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
+                this.managedFilters.push(filter);
             }
 
-            this.managedFilters.push(filter);
-
             // TODO - this only needs to be done once?
             renderer.bindVao(null);
 
diff --git a/src/core/sprites/webgl/SpriteRenderer.js b/src/core/sprites/webgl/SpriteRenderer.js
index 8fd44c1..9f2dda1 100644
--- a/src/core/sprites/webgl/SpriteRenderer.js
+++ b/src/core/sprites/webgl/SpriteRenderer.js
@@ -241,9 +241,19 @@
         // copy textures..
         for (i = 0; i < MAX_TEXTURES; ++i)
         {
-            boundTextures[i] = rendererBoundTextures[i];
-            boundTextures[i]._virtalBoundId = i;
+            const bt = rendererBoundTextures[i];
+
+            if (bt._enabled === TICK)
+            {
+                boundTextures[i] = this.renderer.emptyTextures[i];
+                continue;
+            }
+
+            boundTextures[i] = bt;
+            bt._virtalBoundId = i;
+            bt._enabled = TICK;
         }
+        TICK++;
 
         for (i = 0; i < this.currentIndex; ++i)
         {
diff --git a/src/core/text/TextMetrics.js b/src/core/text/TextMetrics.js
index c4f32e1..904f4e6 100644
--- a/src/core/text/TextMetrics.js
+++ b/src/core/text/TextMetrics.js
@@ -106,6 +106,7 @@
         // Greedy wrapping algorithm that will wrap words as the line grows longer
         // than its horizontal bounds.
         let result = '';
+        const firstChar = text.charAt(0);
         const lines = text.split('\n');
         const wordWrapWidth = style.wordWrapWidth;
         const characterCache = {};
@@ -142,7 +143,7 @@
                         }
                         else
                         {
-                            if (c === 0)
+                            if (c === 0 && (j > 0 || firstChar === ' '))
                             {
                                 result += ' ';
                             }
diff --git a/src/core/text/TextStyle.js b/src/core/text/TextStyle.js
index c682a36..c7ab5c2 100644
--- a/src/core/text/TextStyle.js
+++ b/src/core/text/TextStyle.js
@@ -75,7 +75,8 @@
      * @param {number} [style.letterSpacing=0] - The amount of spacing between letters, default is 0
      * @param {number} [style.lineHeight] - The line height, a number that represents the vertical space that a letter uses
      * @param {string} [style.lineJoin='miter'] - The lineJoin property sets the type of corner created, it can resolve
-     *      spiked text issues. Default is 'miter' (creates a sharp corner).
+     *      spiked text issues. Possible values "miter" (creates a sharp corner), "round" (creates a round corner) or "bevel"
+     *      (creates a squared corner).
      * @param {number} [style.miterLimit=10] - The miter limit to use when using the 'miter' lineJoin mode. This can reduce
      *      or increase the spikiness of rendered text.
      * @param {number} [style.padding=0] - Occasionally some fonts are cropped. Adding some padding will prevent this from
@@ -93,7 +94,9 @@
     {
         this.styleID = 0;
 
-        Object.assign(this, defaultStyle, style);
+        this.reset();
+
+        deepCopyProperties(this, style, style);
     }
 
     /**
@@ -106,10 +109,7 @@
     {
         const clonedProperties = {};
 
-        for (const key in defaultStyle)
-        {
-            clonedProperties[key] = this[key];
-        }
+        deepCopyProperties(clonedProperties, this, defaultStyle);
 
         return new TextStyle(clonedProperties);
     }
@@ -119,7 +119,7 @@
      */
     reset()
     {
-        Object.assign(this, defaultStyle);
+        deepCopyProperties(this, defaultStyle, defaultStyle);
     }
 
     /**
@@ -755,3 +755,20 @@
 
     return true;
 }
+
+/**
+ * Utility function to ensure that object properties are copied by value, and not by reference
+ *
+ * @param {Object} target Target object to copy properties into
+ * @param {Object} source Source object for the proporties to copy
+ * @param {string} propertyObj Object containing properties names we want to loop over
+ */
+function deepCopyProperties(target, source, propertyObj) {
+    for (const prop in propertyObj) {
+        if (Array.isArray(source[prop])) {
+            target[prop] = source[prop].slice();
+        } else {
+            target[prop] = source[prop];
+        }
+    }
+}
diff --git a/src/core/textures/BaseTexture.js b/src/core/textures/BaseTexture.js
index 0d223a8..df904bb 100644
--- a/src/core/textures/BaseTexture.js
+++ b/src/core/textures/BaseTexture.js
@@ -736,7 +736,9 @@
 
     /**
      * Helper function that creates a base texture based on the source you provide.
-     * The source can be - image url, image element, canvas element.
+     * The source can be - image url, image element, canvas element. If the
+     * source is an image url or an image element and not in the base texture
+     * cache, it will be created and loaded.
      *
      * @static
      * @param {string|HTMLImageElement|HTMLCanvasElement} source - The source to create base texture from.
diff --git a/src/core/textures/VideoBaseTexture.js b/src/core/textures/VideoBaseTexture.js
index 86f0873..2e7719b 100644
--- a/src/core/textures/VideoBaseTexture.js
+++ b/src/core/textures/VideoBaseTexture.js
@@ -196,6 +196,10 @@
         {
             BaseTexture.removeFromCache(this.source._pixiId);
             delete this.source._pixiId;
+
+            this.source.pause();
+            this.source.src = '';
+            this.source.load();
         }
 
         super.destroy();
diff --git a/src/filters/alpha/AlphaFilter.js b/src/filters/alpha/AlphaFilter.js
index c2824ed..4446003 100644
--- a/src/filters/alpha/AlphaFilter.js
+++ b/src/filters/alpha/AlphaFilter.js
@@ -22,9 +22,9 @@
 export default class AlphaFilter extends core.Filter
 {
     /**
-     *
+     * @param {number} [alpha=1] Amount of alpha from 0 to 1, where 0 is transparent
      */
-    constructor()
+    constructor(alpha = 1.0)
     {
         super(
             // vertex shader
@@ -33,7 +33,7 @@
             readFileSync(join(__dirname, './alpha.frag'), 'utf8')
         );
 
-        this.alpha = 1.0;
+        this.alpha = alpha;
         this.glShaderKey = 'alpha';
     }
 
diff --git a/src/filters/colormatrix/ColorMatrixFilter.js b/src/filters/colormatrix/ColorMatrixFilter.js
index e1d647a..8ab60d9 100644
--- a/src/filters/colormatrix/ColorMatrixFilter.js
+++ b/src/filters/colormatrix/ColorMatrixFilter.js
@@ -8,7 +8,7 @@
  * with a new set of RGBA color and alpha values. It's pretty powerful!
  *
  * ```js
- *  let colorMatrix = new PIXI.ColorMatrixFilter();
+ *  let colorMatrix = new PIXI.filters.ColorMatrixFilter();
  *  container.filters = [colorMatrix];
  *  colorMatrix.contrast(2);
  * ```
diff --git a/src/particles/webgl/ParticleBuffer.js b/src/particles/webgl/ParticleBuffer.js
index 0d41f66..e118769 100644
--- a/src/particles/webgl/ParticleBuffer.js
+++ b/src/particles/webgl/ParticleBuffer.js
@@ -259,12 +259,16 @@
     destroy()
     {
         this.dynamicProperties = null;
-        this.dynamicData = null;
         this.dynamicBuffer.destroy();
+        this.dynamicBuffer = null;
+        this.dynamicData = null;
+        this.dynamicDataUint32 = null;
 
         this.staticProperties = null;
-        this.staticData = null;
         this.staticBuffer.destroy();
+        this.staticBuffer = null;
+        this.staticData = null;
+        this.staticDataUint32 = null;
     }
 
 }

diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index 53f2ae1..4702b5b 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -227,15 +227,15 @@
                     shader = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
 
                     filter.glShaders[renderer.CONTEXT_UID] = this.shaderCache[filter.glShaderKey] = shader;
+                    this.managedFilters.push(filter);
                 }
             }
             else
             {
                 shader = filter.glShaders[renderer.CONTEXT_UID] = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
+                this.managedFilters.push(filter);
             }
 
-            this.managedFilters.push(filter);
-
             // TODO - this only needs to be done once?
             renderer.bindVao(null);
 
diff --git a/src/core/sprites/webgl/SpriteRenderer.js b/src/core/sprites/webgl/SpriteRenderer.js
index 8fd44c1..9f2dda1 100644
--- a/src/core/sprites/webgl/SpriteRenderer.js
+++ b/src/core/sprites/webgl/SpriteRenderer.js
@@ -241,9 +241,19 @@
         // copy textures..
         for (i = 0; i < MAX_TEXTURES; ++i)
         {
-            boundTextures[i] = rendererBoundTextures[i];
-            boundTextures[i]._virtalBoundId = i;
+            const bt = rendererBoundTextures[i];
+
+            if (bt._enabled === TICK)
+            {
+                boundTextures[i] = this.renderer.emptyTextures[i];
+                continue;
+            }
+
+            boundTextures[i] = bt;
+            bt._virtalBoundId = i;
+            bt._enabled = TICK;
         }
+        TICK++;
 
         for (i = 0; i < this.currentIndex; ++i)
         {
diff --git a/src/core/text/TextMetrics.js b/src/core/text/TextMetrics.js
index c4f32e1..904f4e6 100644
--- a/src/core/text/TextMetrics.js
+++ b/src/core/text/TextMetrics.js
@@ -106,6 +106,7 @@
         // Greedy wrapping algorithm that will wrap words as the line grows longer
         // than its horizontal bounds.
         let result = '';
+        const firstChar = text.charAt(0);
         const lines = text.split('\n');
         const wordWrapWidth = style.wordWrapWidth;
         const characterCache = {};
@@ -142,7 +143,7 @@
                         }
                         else
                         {
-                            if (c === 0)
+                            if (c === 0 && (j > 0 || firstChar === ' '))
                             {
                                 result += ' ';
                             }
diff --git a/src/core/text/TextStyle.js b/src/core/text/TextStyle.js
index c682a36..c7ab5c2 100644
--- a/src/core/text/TextStyle.js
+++ b/src/core/text/TextStyle.js
@@ -75,7 +75,8 @@
      * @param {number} [style.letterSpacing=0] - The amount of spacing between letters, default is 0
      * @param {number} [style.lineHeight] - The line height, a number that represents the vertical space that a letter uses
      * @param {string} [style.lineJoin='miter'] - The lineJoin property sets the type of corner created, it can resolve
-     *      spiked text issues. Default is 'miter' (creates a sharp corner).
+     *      spiked text issues. Possible values "miter" (creates a sharp corner), "round" (creates a round corner) or "bevel"
+     *      (creates a squared corner).
      * @param {number} [style.miterLimit=10] - The miter limit to use when using the 'miter' lineJoin mode. This can reduce
      *      or increase the spikiness of rendered text.
      * @param {number} [style.padding=0] - Occasionally some fonts are cropped. Adding some padding will prevent this from
@@ -93,7 +94,9 @@
     {
         this.styleID = 0;
 
-        Object.assign(this, defaultStyle, style);
+        this.reset();
+
+        deepCopyProperties(this, style, style);
     }
 
     /**
@@ -106,10 +109,7 @@
     {
         const clonedProperties = {};
 
-        for (const key in defaultStyle)
-        {
-            clonedProperties[key] = this[key];
-        }
+        deepCopyProperties(clonedProperties, this, defaultStyle);
 
         return new TextStyle(clonedProperties);
     }
@@ -119,7 +119,7 @@
      */
     reset()
     {
-        Object.assign(this, defaultStyle);
+        deepCopyProperties(this, defaultStyle, defaultStyle);
     }
 
     /**
@@ -755,3 +755,20 @@
 
     return true;
 }
+
+/**
+ * Utility function to ensure that object properties are copied by value, and not by reference
+ *
+ * @param {Object} target Target object to copy properties into
+ * @param {Object} source Source object for the proporties to copy
+ * @param {string} propertyObj Object containing properties names we want to loop over
+ */
+function deepCopyProperties(target, source, propertyObj) {
+    for (const prop in propertyObj) {
+        if (Array.isArray(source[prop])) {
+            target[prop] = source[prop].slice();
+        } else {
+            target[prop] = source[prop];
+        }
+    }
+}
diff --git a/src/core/textures/BaseTexture.js b/src/core/textures/BaseTexture.js
index 0d223a8..df904bb 100644
--- a/src/core/textures/BaseTexture.js
+++ b/src/core/textures/BaseTexture.js
@@ -736,7 +736,9 @@
 
     /**
      * Helper function that creates a base texture based on the source you provide.
-     * The source can be - image url, image element, canvas element.
+     * The source can be - image url, image element, canvas element. If the
+     * source is an image url or an image element and not in the base texture
+     * cache, it will be created and loaded.
      *
      * @static
      * @param {string|HTMLImageElement|HTMLCanvasElement} source - The source to create base texture from.
diff --git a/src/core/textures/VideoBaseTexture.js b/src/core/textures/VideoBaseTexture.js
index 86f0873..2e7719b 100644
--- a/src/core/textures/VideoBaseTexture.js
+++ b/src/core/textures/VideoBaseTexture.js
@@ -196,6 +196,10 @@
         {
             BaseTexture.removeFromCache(this.source._pixiId);
             delete this.source._pixiId;
+
+            this.source.pause();
+            this.source.src = '';
+            this.source.load();
         }
 
         super.destroy();
diff --git a/src/filters/alpha/AlphaFilter.js b/src/filters/alpha/AlphaFilter.js
index c2824ed..4446003 100644
--- a/src/filters/alpha/AlphaFilter.js
+++ b/src/filters/alpha/AlphaFilter.js
@@ -22,9 +22,9 @@
 export default class AlphaFilter extends core.Filter
 {
     /**
-     *
+     * @param {number} [alpha=1] Amount of alpha from 0 to 1, where 0 is transparent
      */
-    constructor()
+    constructor(alpha = 1.0)
     {
         super(
             // vertex shader
@@ -33,7 +33,7 @@
             readFileSync(join(__dirname, './alpha.frag'), 'utf8')
         );
 
-        this.alpha = 1.0;
+        this.alpha = alpha;
         this.glShaderKey = 'alpha';
     }
 
diff --git a/src/filters/colormatrix/ColorMatrixFilter.js b/src/filters/colormatrix/ColorMatrixFilter.js
index e1d647a..8ab60d9 100644
--- a/src/filters/colormatrix/ColorMatrixFilter.js
+++ b/src/filters/colormatrix/ColorMatrixFilter.js
@@ -8,7 +8,7 @@
  * with a new set of RGBA color and alpha values. It's pretty powerful!
  *
  * ```js
- *  let colorMatrix = new PIXI.ColorMatrixFilter();
+ *  let colorMatrix = new PIXI.filters.ColorMatrixFilter();
  *  container.filters = [colorMatrix];
  *  colorMatrix.contrast(2);
  * ```
diff --git a/src/particles/webgl/ParticleBuffer.js b/src/particles/webgl/ParticleBuffer.js
index 0d41f66..e118769 100644
--- a/src/particles/webgl/ParticleBuffer.js
+++ b/src/particles/webgl/ParticleBuffer.js
@@ -259,12 +259,16 @@
     destroy()
     {
         this.dynamicProperties = null;
-        this.dynamicData = null;
         this.dynamicBuffer.destroy();
+        this.dynamicBuffer = null;
+        this.dynamicData = null;
+        this.dynamicDataUint32 = null;
 
         this.staticProperties = null;
-        this.staticData = null;
         this.staticBuffer.destroy();
+        this.staticBuffer = null;
+        this.staticData = null;
+        this.staticDataUint32 = null;
     }
 
 }
diff --git a/src/particles/webgl/ParticleShader.js b/src/particles/webgl/ParticleShader.js
index b3584fe..d536190 100644
--- a/src/particles/webgl/ParticleShader.js
+++ b/src/particles/webgl/ParticleShader.js
@@ -31,10 +31,10 @@
                 'varying vec4 vColor;',
 
                 'void main(void){',
-                '   vec2 v = aVertexPosition;',
+                '   float x = (aVertexPosition.x) * cos(aRotation) - (aVertexPosition.y) * sin(aRotation);',
+                '   float y = (aVertexPosition.x) * sin(aRotation) + (aVertexPosition.y) * cos(aRotation);',
 
-                '   v.x = (aVertexPosition.x) * cos(aRotation) - (aVertexPosition.y) * sin(aRotation);',
-                '   v.y = (aVertexPosition.x) * sin(aRotation) + (aVertexPosition.y) * cos(aRotation);',
+                '   vec2 v = vec2(x, y);',
                 '   v = v + aPositionCoord;',
 
                 '   gl_Position = vec4((projectionMatrix * vec3(v, 1.0)).xy, 0.0, 1.0);',
@@ -52,7 +52,6 @@
 
                 'void main(void){',
                 '  vec4 color = texture2D(uSampler, vTextureCoord) * vColor;',
-                '  if (color.a == 0.0) discard;',
                 '  gl_FragColor = color;',
                 '}',
             ].join('\n')

diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index 53f2ae1..4702b5b 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -227,15 +227,15 @@
                     shader = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
 
                     filter.glShaders[renderer.CONTEXT_UID] = this.shaderCache[filter.glShaderKey] = shader;
+                    this.managedFilters.push(filter);
                 }
             }
             else
             {
                 shader = filter.glShaders[renderer.CONTEXT_UID] = new Shader(this.gl, filter.vertexSrc, filter.fragmentSrc);
+                this.managedFilters.push(filter);
             }
 
-            this.managedFilters.push(filter);
-
             // TODO - this only needs to be done once?
             renderer.bindVao(null);
 
diff --git a/src/core/sprites/webgl/SpriteRenderer.js b/src/core/sprites/webgl/SpriteRenderer.js
index 8fd44c1..9f2dda1 100644
--- a/src/core/sprites/webgl/SpriteRenderer.js
+++ b/src/core/sprites/webgl/SpriteRenderer.js
@@ -241,9 +241,19 @@
         // copy textures..
         for (i = 0; i < MAX_TEXTURES; ++i)
         {
-            boundTextures[i] = rendererBoundTextures[i];
-            boundTextures[i]._virtalBoundId = i;
+            const bt = rendererBoundTextures[i];
+
+            if (bt._enabled === TICK)
+            {
+                boundTextures[i] = this.renderer.emptyTextures[i];
+                continue;
+            }
+
+            boundTextures[i] = bt;
+            bt._virtalBoundId = i;
+            bt._enabled = TICK;
         }
+        TICK++;
 
         for (i = 0; i < this.currentIndex; ++i)
         {
diff --git a/src/core/text/TextMetrics.js b/src/core/text/TextMetrics.js
index c4f32e1..904f4e6 100644
--- a/src/core/text/TextMetrics.js
+++ b/src/core/text/TextMetrics.js
@@ -106,6 +106,7 @@
         // Greedy wrapping algorithm that will wrap words as the line grows longer
         // than its horizontal bounds.
         let result = '';
+        const firstChar = text.charAt(0);
         const lines = text.split('\n');
         const wordWrapWidth = style.wordWrapWidth;
         const characterCache = {};
@@ -142,7 +143,7 @@
                         }
                         else
                         {
-                            if (c === 0)
+                            if (c === 0 && (j > 0 || firstChar === ' '))
                             {
                                 result += ' ';
                             }
diff --git a/src/core/text/TextStyle.js b/src/core/text/TextStyle.js
index c682a36..c7ab5c2 100644
--- a/src/core/text/TextStyle.js
+++ b/src/core/text/TextStyle.js
@@ -75,7 +75,8 @@
      * @param {number} [style.letterSpacing=0] - The amount of spacing between letters, default is 0
      * @param {number} [style.lineHeight] - The line height, a number that represents the vertical space that a letter uses
      * @param {string} [style.lineJoin='miter'] - The lineJoin property sets the type of corner created, it can resolve
-     *      spiked text issues. Default is 'miter' (creates a sharp corner).
+     *      spiked text issues. Possible values "miter" (creates a sharp corner), "round" (creates a round corner) or "bevel"
+     *      (creates a squared corner).
      * @param {number} [style.miterLimit=10] - The miter limit to use when using the 'miter' lineJoin mode. This can reduce
      *      or increase the spikiness of rendered text.
      * @param {number} [style.padding=0] - Occasionally some fonts are cropped. Adding some padding will prevent this from
@@ -93,7 +94,9 @@
     {
         this.styleID = 0;
 
-        Object.assign(this, defaultStyle, style);
+        this.reset();
+
+        deepCopyProperties(this, style, style);
     }
 
     /**
@@ -106,10 +109,7 @@
     {
         const clonedProperties = {};
 
-        for (const key in defaultStyle)
-        {
-            clonedProperties[key] = this[key];
-        }
+        deepCopyProperties(clonedProperties, this, defaultStyle);
 
         return new TextStyle(clonedProperties);
     }
@@ -119,7 +119,7 @@
      */
     reset()
     {
-        Object.assign(this, defaultStyle);
+        deepCopyProperties(this, defaultStyle, defaultStyle);
     }
 
     /**
@@ -755,3 +755,20 @@
 
     return true;
 }
+
+/**
+ * Utility function to ensure that object properties are copied by value, and not by reference
+ *
+ * @param {Object} target Target object to copy properties into
+ * @param {Object} source Source object for the proporties to copy
+ * @param {string} propertyObj Object containing properties names we want to loop over
+ */
+function deepCopyProperties(target, source, propertyObj) {
+    for (const prop in propertyObj) {
+        if (Array.isArray(source[prop])) {
+            target[prop] = source[prop].slice();
+        } else {
+            target[prop] = source[prop];
+        }
+    }
+}
diff --git a/src/core/textures/BaseTexture.js b/src/core/textures/BaseTexture.js
index 0d223a8..df904bb 100644
--- a/src/core/textures/BaseTexture.js
+++ b/src/core/textures/BaseTexture.js
@@ -736,7 +736,9 @@
 
     /**
      * Helper function that creates a base texture based on the source you provide.
-     * The source can be - image url, image element, canvas element.
+     * The source can be - image url, image element, canvas element. If the
+     * source is an image url or an image element and not in the base texture
+     * cache, it will be created and loaded.
      *
      * @static
      * @param {string|HTMLImageElement|HTMLCanvasElement} source - The source to create base texture from.
diff --git a/src/core/textures/VideoBaseTexture.js b/src/core/textures/VideoBaseTexture.js
index 86f0873..2e7719b 100644
--- a/src/core/textures/VideoBaseTexture.js
+++ b/src/core/textures/VideoBaseTexture.js
@@ -196,6 +196,10 @@
         {
             BaseTexture.removeFromCache(this.source._pixiId);
             delete this.source._pixiId;
+
+            this.source.pause();
+            this.source.src = '';
+            this.source.load();
         }
 
         super.destroy();
diff --git a/src/filters/alpha/AlphaFilter.js b/src/filters/alpha/AlphaFilter.js
index c2824ed..4446003 100644
--- a/src/filters/alpha/AlphaFilter.js
+++ b/src/filters/alpha/AlphaFilter.js
@@ -22,9 +22,9 @@
 export default class AlphaFilter extends core.Filter
 {
     /**
-     *
+     * @param {number} [alpha=1] Amount of alpha from 0 to 1, where 0 is transparent
      */
-    constructor()
+    constructor(alpha = 1.0)
     {
         super(
             // vertex shader
@@ -33,7 +33,7 @@
             readFileSync(join(__dirname, './alpha.frag'), 'utf8')
         );
 
-        this.alpha = 1.0;
+        this.alpha = alpha;
         this.glShaderKey = 'alpha';
     }
 
diff --git a/src/filters/colormatrix/ColorMatrixFilter.js b/src/filters/colormatrix/ColorMatrixFilter.js
index e1d647a..8ab60d9 100644
--- a/src/filters/colormatrix/ColorMatrixFilter.js
+++ b/src/filters/colormatrix/ColorMatrixFilter.js
@@ -8,7 +8,7 @@
  * with a new set of RGBA color and alpha values. It's pretty powerful!
  *
  * ```js
- *  let colorMatrix = new PIXI.ColorMatrixFilter();
+ *  let colorMatrix = new PIXI.filters.ColorMatrixFilter();
  *  container.filters = [colorMatrix];
  *  colorMatrix.contrast(2);
  * ```
diff --git a/src/particles/webgl/ParticleBuffer.js b/src/particles/webgl/ParticleBuffer.js
index 0d41f66..e118769 100644
--- a/src/particles/webgl/ParticleBuffer.js
+++ b/src/particles/webgl/ParticleBuffer.js
@@ -259,12 +259,16 @@
     destroy()
     {
         this.dynamicProperties = null;
-        this.dynamicData = null;
         this.dynamicBuffer.destroy();
+        this.dynamicBuffer = null;
+        this.dynamicData = null;
+        this.dynamicDataUint32 = null;
 
         this.staticProperties = null;
-        this.staticData = null;
         this.staticBuffer.destroy();
+        this.staticBuffer = null;
+        this.staticData = null;
+        this.staticDataUint32 = null;
     }
 
 }
diff --git a/src/particles/webgl/ParticleShader.js b/src/particles/webgl/ParticleShader.js
index b3584fe..d536190 100644
--- a/src/particles/webgl/ParticleShader.js
+++ b/src/particles/webgl/ParticleShader.js
@@ -31,10 +31,10 @@
                 'varying vec4 vColor;',
 
                 'void main(void){',
-                '   vec2 v = aVertexPosition;',
+                '   float x = (aVertexPosition.x) * cos(aRotation) - (aVertexPosition.y) * sin(aRotation);',
+                '   float y = (aVertexPosition.x) * sin(aRotation) + (aVertexPosition.y) * cos(aRotation);',
 
-                '   v.x = (aVertexPosition.x) * cos(aRotation) - (aVertexPosition.y) * sin(aRotation);',
-                '   v.y = (aVertexPosition.x) * sin(aRotation) + (aVertexPosition.y) * cos(aRotation);',
+                '   vec2 v = vec2(x, y);',
                 '   v = v + aPositionCoord;',
 
                 '   gl_Position = vec4((projectionMatrix * vec3(v, 1.0)).xy, 0.0, 1.0);',
@@ -52,7 +52,6 @@
 
                 'void main(void){',
                 '  vec4 color = texture2D(uSampler, vTextureCoord) * vColor;',
-                '  if (color.a == 0.0) discard;',
                 '  gl_FragColor = color;',
                 '}',
             ].join('\n')
diff --git a/test/core/TextStyle.js b/test/core/TextStyle.js
index 49b99ef..1976333 100644
--- a/test/core/TextStyle.js
+++ b/test/core/TextStyle.js
@@ -50,4 +50,14 @@
 
         expect(style.toFontString()).to.have.string('"Georgia","Arial","sans-serif"');
     });
+
+    it('should not shared array / object references between different instances', function ()
+    {
+        const defaultStyle = new PIXI.TextStyle();
+        const style = new PIXI.TextStyle();
+
+        expect(defaultStyle.fillGradientStops.length).to.equal(style.fillGradientStops.length);
+        style.fillGradientStops.push(0);
+        expect(defaultStyle.fillGradientStops.length).to.not.equal(style.fillGradientStops.length);
+    });
 });