I can't tell from that output if you are using wayland or X11. If it is wayland I'd try X11 as the drivers before 555(?) don't work as well and some compositors may be more unstable with the nvidia drivers.
I'd also try checking the logs as well. 'journalctl -b -1 -xe' to show the prior boot.
These is my only other suggestions.
I have seen this as well with a couple games(FarCry 4/5). Also Arch/Plasma 6 with Nvidia 4080. I don't know if it is driver, kwin or dxvk related or something else though.
I haven't figured out how to resolve it either.