Is BTRFS unstable? (Update: It's not unstable, the problem is probably something else)

[Zesko]

@veprovina

Last time it happened, i was switching activities, and the activity panel got “stuck” and frozen, as well as the taskbar. Can it be KDE?

If you mean the issue, I see there are many same errors (ksmserver-logou, kioslave5 and plasmashell) in your log. Yes, they are related to bad KDE environment and configuration, that I guess.