DynamicTexture.setSize will now check to see if the glTexture bound to the current frame is stale, and if so, destroy it before binding the one from the Render Target. This fixes an issue where constantly destroy and creating Dynamic Textures would cause a memory leak in WebGL. Fix #6669

src/textures/DynamicTexture.js

@@ -269,7 +269,10 @@ var DynamicTexture = new Class({
                 if (renderTarget.willResize(width, height))
                 {
                     renderTarget.resize(width, height);
+                }
 
+                if (renderTarget.texture !== source.glTexture)
+                {
                     //  The WebGLTexture has been resized, so is new, so we need to delete the old one
                     this.renderer.deleteTexture(source.glTexture);
                 }