I am still experiencing this issue, I have tried many attempts to recreate the problem to figure out what might be causing it(low battery, pushing GPU, pushing CPU, and even certain segments in a game that frequently ran into this problem) but I still can’t figure out why. It’s very frustrating to experience as it ruins the experience, and I am sad to see this post about valve not addressing this issue

So it says, but I just forced the compatibility layer to proton experimental and it worked for me and my family then it ran smooth even with multiple players

Lego: Lord of the Rings

Into the Breach

Blasphemous

Remant into the ashes complete edition

Celeste

Gris

Hot wheels unleashed

Prey: Typhon hunter

Inside

Dishonored

Trine 4

The last campfire

Donut county

Portal 2

Titanfall 2

ROR2 Void DLC