Thanks for your explanation of how gnome-shell workspaces work or should work.
I'm not seeing this problem with Ubuntu 18.04 where all applications remain visible on the workspace that they are on before gnome-shell is restarted. I don't use Ubuntu 18.10 due to gnome-shell crashing when restarted: bug 1796607.
I don't think this is a duplicate of bug 1181666 as it is only the windows that gnome-shell has failed to hide that are not clickable. The 'wanted' application, the dock and top bar all function correctly.
Thanks for your explanation of how gnome-shell workspaces work or should work.
I'm not seeing this problem with Ubuntu 18.04 where all applications remain visible on the workspace that they are on before gnome-shell is restarted. I don't use Ubuntu 18.10 due to gnome-shell crashing when restarted: bug 1796607.
I don't think this is a duplicate of bug 1181666 as it is only the windows that gnome-shell has failed to hide that are not clickable. The 'wanted' application, the dock and top bar all function correctly.
I'll update the bug description a little.