Hey friends. I have been using Linux exclusively for about 3 weeks. I've been amazed at how well gaming works out of the box with Steam and proton.

I only have this minor issue, I'm sure someone can point me to the right direction. I use 2 monitors, I game on the primary monitor and do whatever else on the second. Whenever I go back to the gaming monitor, the game shows the window decorations for just a second and then goes back to full screen. It flickers. Obviously not a major problem, but it's annoying.

If I go to the game settings, set it as windowed and then back to full-screen it occasionally fixes the problem but only until I start the game again.

I currently use EndeavourOS w/ KDE but the problem also happened on Manjaro!

EDIT: As always, the Arch Wiki had the answer, I just didn't see because it seems to describe a different issue. SDL_VIDEO_MINIMIZE_ON_FOCUS_LOSS=0 environment variable seems to do the trick.