

Works perfectly for me without any tinkering required
After a few hours of playing, the game starts to stutter. After a restart, the game is back to normal. Only happens after long, continous sessions of playing.

Seems to be working just fine
Works fine out of the box with Proton 8.0-4.

Aside from the one crash noted, has been quite stable and smooth.
It crashed one time during the very first load, while sitting at the main menu - but has not crashed since (so far).
That initial crash worried me, but once I restarted it's behaved well every session. Must have been a fluke, because it's cooking along just fine now.
The game will not launch on any newer version of proton after 6.3-8
After Alt+Tab, the game screen would not load again. The OS also noted that the game/app was no longer responding.
Ended up using the Force Quit option on the OS message and relaunching.