It looks like the last object rendered (regardless of it's size) is the only thing that will respond to mouse events regardless of it's interactive setting. For example, if I have a layer (container) of sprites and I want them to respond to mouse events, but, I want them to render below an unfilled rectangle, then, even if I set the interactivity member of the rectangle to false, I still can't trigger mouse events on the sprites. Is that the case?