Bluetooth connection to my headset sometimes causes the entire system to hard lock, requiring physical reset.
Sound sometimes goes static-y, have to reboot to fix.
I had to download a third party tweaker app to disable a sound output device that I didn't want to use.
Tearing of full screen video, I don't even remember how I fixed it.
A notification about something called "snap store" keeps coming up and needs a command line fix to dismiss.
The built-in app store keeps notifying me about a firmware update for my wireless keyboard. I'm not interested, and there is no way to dismiss it.
Firefox on Linux has an obnoxious habit of refusing to open a new tab until I restart it for updates (that were installed automatically, not through the system updates app). Sure, I want my browser up-to-date, but this is not an issue on Windows where it will never force you to restart the application. I looked around why this is the way it is, and the answers were that it had to do with how Linux works.
And, yeah, games.