Computer briefly black-screens and closes everything - Lemmy.world

I’m on arch, using KDE. AMD CPU and GPU. For the last few months, my computer will occasionally go into a TTY briefly and show a few things (way too fast to read) and then shoot me back to the desktop where every program that was running is closed. Almost like a mini crash. Super weird. I tried looking in /car/log, but couldn’t find anything relevant. Anyone know what’s up with this?