diff --git a/src/core/renderers/webgl/TextureManager.js b/src/core/renderers/webgl/TextureManager.js
index d8187a8..700f9f7 100644
--- a/src/core/renderers/webgl/TextureManager.js
+++ b/src/core/renderers/webgl/TextureManager.js
@@ -80,6 +80,9 @@
 
         const boundTextures = this.renderer.boundTextures;
 
+        // if the location is undefined then this may have been called by n event.
+        // this being the case the texture may already be bound to a slot. As a texture can only be bound once
+        // we need tofind its current location if it exists.
         if (location === undefined)
         {
             location = 0;
@@ -91,6 +94,7 @@
                 if (boundTextures[i] === texture)
                 {
                     location = i;
+                    break;
                 }
             }
         }