Could you add your 'journalctl -b 0' log after triggering the issue? The lockscreen mode of gnome-shell is supposed to disable the extensions so you shouldn't have a dock or appindicator on that screen
Could you add your 'journalctl -b 0' log after triggering the issue? The lockscreen mode of gnome-shell is supposed to disable the extensions so you shouldn't have a dock or appindicator on that screen