Games Freeze in Cinnamon but not in Gnome?

TL;DR - Video games freeze in Cinnamon but not in Gnome?

Hi!
I am a newbie in Nixos, but I like it.
So I have encountered a strange bug recently - when I was playing DOTA or CS2 - it pretty soon after launch got frozen to the point that I cannot even access tty session - it is completely unresponsive, only reboot helps.

After investigation - I discovered that it only happened on Cinnamon and other KDEs, but not on Gnome.
If I switched to Gnome, I didn’t even need to reboot, just rebuild and it runs totally fine!
But the problem is - since I come from Linux Mint - I really want to stay on Cinnamon all the time, without this strange switching.

Any help will be appreciated!

Maybe it is worth adding that during initial installation I selected Gnome? I am not sure though if it had any effect in this case