Also seeing this problem with 18.10 Cosmic. The offending Qt application is the VirtualBox from Ubuntu repo.
** Tags added: cosmic -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell-extension-appindicator in Ubuntu. https://bugs.launchpad.net/bugs/1712866 Title: icons from qt applications disappear after screen lock/sleep To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-appindicator/+bug/1712866/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
