Hey, not sure if this is something caused by KCD2 as it's the only thing I've played since I've gotten Bazzite 3 days ago, but I've been experiencing some serious instability since yesterday. Twice the entire OS GUI crashed (black screen, all apps close). Other than that, applications have been freezing graphically (sound & function works normally, but graphics is in some way absolutely fucked), not being able to open new applications (Firefox REFUSES to open new window), etc..
Beyond a few apps/games, OS is almost default settings. Played KCD2 2 days ago through Steam and it went fine-ish, no crashes, but was having a weird bug where apps would stop responding to LMB/RMB. I was advised to try Gamescope, and while it did fix that concrete issue, the stability has been absolutely terrible.
Attached a screenshot of what opening Steam can look like when it bugs. Quitting the game and/or restarting the frozen app fixes the issue.