I just built a dedicated Linux gaming machine. Brand new parts and I installed Pop!_OS last night. At first Steam wouldn't load from the Pop Store install. It would quickly flash the app then disapear. Repeatedly until I exited it. So I removed it then installed it via sudo apt install steam and then it worked. I was able to sign in and download Outer Worlds: Spacer's Choice edition. After it finished installing I got a notification that there was an issue with cloud saves syncing. The only option is to retry. Each time the issue would repeat. Unable to sync.

I then downloaded Hammerwatch II and that syncs fine. I confirmed by starting the game and loading my save from my Steam Deck from the cloud. I then tried Warhammer: BoltGun and that will not sync either.

It's important to note that until last night, all 3 of these games were played only on Steam Deck, so I find it odd that it wouldn't sync with the app also installed on a Linux environment.

Anyone else run into this? I also just noticed Steam is back to flashing again. But I'll need to gather log info for that before asking for help.