Thanks for the video.
Just so I understand – the freeze does NOT appear after you start AP with a blank scene and just make a few edits. It appears after you load your file and then do some edits. Is that correct?
The blocky glitches around the lines and undo areas is something unrelated. Other people have reported this. It seems to happen only with certain older graphics cards. We are working on a solution for this problem.
Cheers,
Niels