I'm using shortcuts <Super>+1 ... <Super>+4 to switch between virtual desktops. Let's say there's Xwayland application launched on desktop 1 and I'm on desktop 4. Vscode for example. Now I press <Super>+1 to switch to desktop 1. At this point, vscode starts printing "11111111" until I press Esc.

This bug manifests both for vscode and Idea. I configured these apps to run under native wayland, but they're not ready and other bugs manifest (e.g. no border around vscode window), which are less annoying, but annoying nonetheless.

Oh wow that explains a ton of problems I was having before I switched to KDE.

try cosmic desktop since it was made to be similar to gnome - it's maintained by system76 and is shaping up to be one of the most polished desktops out there, gnome has been feeling like it's going downwards for a while. I can't comment too much tho since I am too used to KDE at the moment and tiling support is just not there yet compared to KWin.

Interesting. I sometimes get similar behaviour on KDE / wayland, usually it is "2" or "3", and it seems to only affect electron apps. Always thought it has something to do with a dodgy ps/2 to usb converter I use to attach my old mechanical keyboards. I think it does not happen if electron apps are started with "--ozone-platform=wayland" but not completely sure, and I have no reliable way to reproduce or somehow trigger that behaviour.