It looks like either gnome-shell-extension-appindicator is failing to shut down when the lock screen tries to unload all extensions; or gnome-shell 3.36 in focal is too old to have that feature and leaves extensions loaded.
It looks like either gnome-shell- extension- appindicator is failing to shut down when the lock screen tries to unload all extensions; or gnome-shell 3.36 in focal is too old to have that feature and leaves extensions loaded.