I have the same problem with the missing UI. I quit and loaded, rebooted the Steam Deck, changed zone, tried the /toggleui command. Nothing works
What happens if you switch to Proton Experimental?
To switch Proton version, go to the game's launch page -> Cogwheel/Settings -> Properties -> Compatibility -> "Force use of a specific Steam Play compatibility
That worked! Didn't know this was a thing. I'll leave it there and hope it does not cause any trouble. Thanks a lot for the help!What happens if you switch to Proton Experimental?
To switch Proton version, go to the game's launch page -> Cogwheel/Settings -> Properties -> Compatibility -> "Force use of a specific Steam Play compatibility tool"