I had the same problem with Fedora which is part of what prompted me to switch. It works great for me in Cachy. I assume either way it was an Nvidia problem.

Yup, I have Nvidia :)

Interestingly enough, I didn't have the same issue with Omarchy/Hyprland. Hyprland doesn't have even the most rudimentary ability to restore windows but it was almost rock solid when it came to coming out of sleep.

Still searching for that one true Linux distribution :) Will stay on Cachy for now because gaming is so much better.