Wave-Modified Collision Object Not Changing Please see a gif pic of my situation: 



http://gph.is/2EwjmKs

The gif image shows that the ball responds only to the mesh-shaped collision object that is present at frame 1 in the first half of the gif picture. 

In the second half, you can see the ball exhibits the same behavior without a moving mesh that's in the same shape as frame 1 in the first half of the gif pic.

How can I elicit a dynamically changing collision object for my wavy plane?
Enable 'Deforming' in the Rigid Body Collisions panel should do it.