Stuttering system after playing a game?

[checkinindza]

Hi, so I'm having a weird issue. Let me start from the specs:

Distro : Arch Linux
Kernel : Linux 6.14.5-3-cachyos
CPU : AMD Ryzen 7 5800H
GPU : NVIDIA GeForce RTX 3060 (Proprietary driver with GSP firmware disabled - 570.144-1)
Hyprland version : 0.48.1-5
Internal display: 1440p165hz and external display 1080p60hz, none of them support VRR, so it's not a VRR issue

Another important fact, I'm not using gamescope as currently it doesn't really work well or at all on laptops.

And the last important fact: I never encountered this kind of issue on KDE Plasma (the system wasn't reinstalled or anything, I just installed Hyprland and started using that). No, Hyprland isn't running in USWM mode.

Now on to the issue:

I'm gonna guess it's only related to Proton games, as playing native games i.e. CS2, the issue doesn't happen.

After playing a game for about 30 minutes or longer, the game itself runs perfectly fine, no degraded performance, no stuttering, nothing. But, when I end the gaming session, close the game and etc., the whole system starts stuttering, lagging and only a restart fixes it. I don't see anything abnormal in btop or anything strange in the logs, but if it helps, here are the system logs from a thirty minute gaming session:

https://paste.gloriouseggroll.tv/?51b9f50a0bfc63c8#CAEqNa6uTRo8em1L9Bn8s2ZaPzaQKCrApPKVmsNNRWJb

Adding LD_PRELOAD="" to game's launch options also doesn't help.