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
And I don’t think you understand OPs point. Of course you should be paranoid as a person like that, but most users aren’t targets. If you, as a regular user, get this paranoid about using computers, maybe you should evaluate your priorities.