Comment 10 for bug 1812883

I worked round this issue by uninstalling gnome-shell-extension-appindicator. This fixed this issue and also a number of high cpu usage issues I was seeing. The cpu issues were sometimes severe enough to also expose weaknesses in the compositor.

I suggest that anyone who is getting problems with gnome shell tries this work around and reports the results back here along with the a quick summary of the problem they were seeing.