Pixels appearing on the screen

If I turn on my PC and I switch from Gaming mode to desktop mode, and then back to Gaming mode, some weird pixels appear on the screen ONLY when opening a game, not in the main menu interface, and they go away when I close the game

I found someone on reddit having the same issue:
https://www.reddit.com/r/Bazzite/s/1vOR5gzLwa

My gpu is: RX 6400 and KDE Plasma
And I haven't done any thinkering, I've just installed the os and installed games from Steam