I feel I'm in the same boat. For several months I've been thinking my GPU was on its way out (it's a pretty old 2080 now). My desktop freezes randomly. I can log into it remotely but all the usb devices stop working and the screen goes blank. l took a good look at the logs and noticed a bunch of pageflip timeouts followed by usb disconnections. I later discovered the Nvidia forums seem to have many recent complaints (with similar logs) especially around their latest drivers and Plasma + Wayland compatibility.