I run proprietary Nvidia drivers as well and Wayland runs so much better than Xorg now that I'm permanently coming over to Wayland. I'm extremely happy rn with Wayland
The new version of plasma coming out on the 28th has this fixed on wayland. We're currently on rc2, but fill release will be soon. It may be a bit before your distro has it available however so you'll have to use a PPA on debian/ubuntu/etc., install manually once it's available, or compile from source if you'de like it now