I think you’re right on this, but i am thinking it’s more of an Nvidia issue rather than a Wayland one… Going to sleep under X11 works the first try, however resuming from sleep showed the following screen (kernel panic? with mentions of Nvidia) https://sh.itjust.works/pictrs/image/8023983c-3e74-477c-b69a-6ff66a8d5918.jpeg
It’s either that or just a black screen. I think this warrants a driver reinstall, I also installed some CUDA stuff so will have to check this out…