Home key in the closed contour mode just takes you to zero,zero instead of zooming out, is this new or some kind of error, I have to go back into part editor to zoom out, I'm sure it wasn't like that before the update. Makes working close up in closed contour pretty much impossible.
Can you post a sample cabinet that is giving you issues? And a sequence of steps? Myself and another here have tried to make it misbehave, but it seems to be working as expected for us. It would be worth it to restart your computer (not power off and power back on), and also check for graphics card driver update from the manufacturer's site.