Heya. I’m using Unity 5.5.2f1 for this, as well as a continuous collision detection on my ball’s rigidbody 2D. I’m also on Windows.
So, just in case you’re bored waiting for the computer to test itself, you can go into edit -> project settings -> Time, and increase the Time Scale. 4 is pretty fast. 2 or 3 might be better. Hope that’s useful.