Comment 19 for bug 1928312

Same problems for me.
Martin said: "Right click on the thunderbird logo in this state just opens an action window which doesn't respond to any clicks."
And Cyril said: "And I use Ctrl+Tab a lot which totally breaks with this bug."
I confirm but I add: the action window that "froze" is above the dock and mask the menu "activities" and some launchers. So we can't use alt-tab nor the mouse to get around the problem. Because we cannot launch any other application.