I moved back to using X11 instead of wayland and have not had the issue
since if this helps anyone else out.
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https://bugs.launchpad.net/bugs/1181666
Title:
gnome-shell randomly blocks
I too have been having this issue in Ubuntu 21.04, Gnome-shell 3.38.4.
My system has a touchpad and touchscreen, the closest i have gotten to
consistently re-create it is to use the touch screen to click on the
same launcher icon multiple times.
It is quite an annoying bug as i get it 4-5 time