Clips disappearing?
I notice this from time to time but always after I split a clip, crop them and then try to move one. It happens because I forget to make sure that only the area of the clip, in the timeline, is selected. If you forget to check that, and the entire area is selected from before you split the clip, it will disappear.
The draw issues in the PC are annoying but I'll take that over the console view jumping around evertime you click on a track.