I am having the same thing at the moment with the Firefox snap package under Ubuntu. Except as well as this, when it updates it seems to take out everything else pinned to the task bar with it. Maybe it’s not Firefox doing that, but since I stopped pinning FF it has stopped happening.
I run KDE Plasma and very rarely have issues with wayland either. Maybe I am imagining it but it feels smoother than X11. I love that in wayland I can use adaptive sync with multiple monitors connected. X11 can’t do that. My main issue with it is that anything involving screenshare doesn’t work properly. So steamplay (as host, client is fine), slack screenshare (again, as the sharer) don’t work. I don’t understand all the people having issues, maybe it’s a hardware/driver thing? On my AMD GPU it is practically flawless.