Sounds more like a software issue tbh. Would not get worried if it doesn't happen regularly. Keep updated and maybe recover/reinstall first if it happens again before opening a ticket for hardware support. https://help.steampowered.com/en/faqs/view/1B71-EDF2-EB6D-2BB3
I've had some rare wonkiness aswell, it's still a consumer Linux device and not a fully locked down console like Xbox or PS
disable cloud sync? I don't understand really get what you are actually complaining about. https://help.steampowered.com/en/faqs/view/68D2-35AB-09A9-7678#enabling