Audition video preview resizing and freezing

Hi!

This frequently happens while I'm working, but it is a somewhat intermittent problem. I've had this issue working both with .mov and .mpr (h264) files: During a session, almost half of my clicks on the multitrack view cause Audition to freeze and, after it comes back 10-15 seconds later, the video window automatically resizes itself to a larger size (no matter if the base video is 1080p, 4k or 720p), messing up my workspace.

This is AWFUL, and it makes me lose a lot of time and patience. I've tried, so far:

- Different video codecs

- Disabling hardware acceleration

- rebooting the computer

- reinstalling audition

- installing more RAM (I now have 64 GB and a different brand)

- changing the base SSD

- changing the scratch disk

I just can't figure out what is going on! I normally navigate through the session using the Time Selection Tool, and the most frequent scenario is when I directly right-click a clip to drag it around, but it also happens with Move Tool.

I'm working on an Intel i9 10900K, RTX 2080 Super, 64 GB dual-channel RAM and M2 Drives for the base files and the scratch disk.