I've got movement on layer 2. Objects are colliding as expected to obstacles.
But when backdrops are created and inserted as "not an obstacle" over other obstacles in layer 2, there is no effect. Objects are not reacting to the changed environment, they should fall straight through the hole.
Moving layer 2 back down to layer 1 fixes the problem.
But I kind of want stuff to be at layer 2.
Any suggestions? Is this a bug, or expected limitation?
EDIT: Here is an example
Move the mouse to erase obstacles. Move layer 2 down to layer 1 and it should work again.