I'm getting a similar problem caused by particles:
This points to the function in the C2 runtime:
typeProto.loadTextures = function ()
if (this.is_family || this.webGL_texture)
this.webGL_texture = this.runtime.glwrap.loadTexture(this.texture_img, true, this.runtime.linearSampling, this.texture_pixelformat);
This happens whether WebGL is enabled or disabled. Deleting the particles solved the problem.