If you hit the ball up the right side of the left ramp just right so it doesn't have much speed it can get caught over on the right side, where the two habitrails join. The wireform than joins in has a bit that sticks out *just* enough to jam the ball if it's moving slow (see photo) but it slips past it with any decent speed.
I'm not sure I can really bend that part, anyone have any experience trying to trim off a bit of a habitrail?