Plasma desktop - freeze after a few hours of usage

[Xenon]

Hi, I'm starting with the issue that is so far the most frustrating for me.

Like in the title - Plasma desktop freeze after a few hours, usually after showing a notification or switching virtual desktops (because it leaves a black/transparent box on the screen).
If it freeze while scrolling desktops, the whole desktop isn't responding; if from the notification - all windows are responding but the plasmashell.
In process viewer, I can see that Xorg and kwin_x11 processes use more CPU than usual.
Restarting plasmashell or aforementioned processes doesn't fix the issue.
The only things that can be done is to hard reset the Deck or kill Xorg (via ssh if the terminal isn't running or the desktop froze while switching virtual desktops) to log off and boot up into Gaming Mode.

It does that on any Global theme/ Application style/ Plasma style.
It does that with and without the docking station.
I'm on the latest stable release of SteamOS.
I already tried reinstalling the system.
Freeze like this never happen in Gaming Mode.

Steps to reproduce:
1. Use Plasma desktop, do whatever you want like browsing the web, often switch between virtual desktops
2. After few hours, the desktop will likely freeze.

I really hope that this will be fixed.