I had one of these and everything worked well at first. I then upgraded my deck to a 2TB SSD but the new deck image from Steam seems to have made the USB ports no longer support my external controllers. My work laptop comes with a G5 unit and that works fine with them so I’ve not investigated the JSAUX issue yet.

Mini motorways. Very chill game

I had a game break on me after an update. Turned out on investigation the game was using proto experimental and somethin that stopped. I reverted to latest numbered Proton release and it started working again.

Good luck