A couple of days ago an issue started to appear after waking from sleep where I was unable to interact with any application on the first workspace visible after signing back in. The issue was tracked down to be gjs, which has put a transparent overlay atop the workspace, making everything underneath it inaccessible without first using an Alt+Tab:
Although the gjs process does have an option to "Quit", the menu action does no such thing. Alt+F4 is also useless to eliminate this nuisance.
Searches for solutions online generally say that rebooting is the most appropriate fix, but I refuse to accept this as a viable answer as it's disruptive and can be worked around with an Alt+Tab. This is happening only on my Ubuntu Desktop 21.10 installation. Other systems have never surfaced this issue.
Has anybody found a proper fix for this annoyance?
I see that too. Try
killall gjs, that will it make go away till next time. Perhaps uninstalling the gjs package helps.