I sometimes have weird behavior from my Gnome desktop: when I play something more computationally intensive like Baldur’s Gate 3 or Hogwarts Legacy, every now and then it happens that all my three monitors go dark briefly, the middle one shows me my Gnome login screen and the other two show some kind of graphic errors. This doesn’t happen all the time and is not reproducible, but it happens once or twice per gaming session.
By the way, I can’t log in to Gnome anymore. I have to restart the PC.