Me too. I was playing pubg first game with my friends in a while and it locked up, restarted took ages to come back then it said it wasn't installed anymore. I was fuming. It's getting to the point in January I may have no choice to switch to team Green. I can't play like that, 338 pounds wasted at this point,
However it seems to always be when I use discord, if I don't use it I can play to my hearts content in single player games. It's mad. And incredibly annoying.
If its when using Discord, try disabling Discord overlay, and Discord hardware acceleration. Overlays from 3rd party applications are known for causing weird issues like this.