A possible workaround is described at https://askubuntu.com/a/1042998/68491 :
> restart GNOME shell by typing Alt+f2, then typing r and pressing Enter -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1740600 Title: Certain app indicators dissappear after laptop hibernates To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-appindicator/+bug/1740600/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
