Additional note. When I maximize then minimize the WallPaperDownloader snap this is written to syslog
Aug 31 17:05:23 localhost org.gnome.Shell.desktop[2638]: Window manager warning: Received a NET_CURRENT_DESKTOP message from a broken (outdated) client who sent a 0 timestamp Aug 31 17:05:23 localhost org.gnome.Shell.desktop[2638]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x2600004 (WallpaperD) Aug 31 17:08:35 localhost org.gnome.Shell.desktop[2638]: Window manager warning: Received a NET_CURRENT_DESKTOP message from a broken (outdated) client who sent a 0 timestamp Aug 31 17:08:35 localhost org.gnome.Shell.desktop[2638]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x2600004 (WallpaperD) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1787822 Title: gnome-shell[2503]: Object Meta.Background (0x561c9af53600), has been already deallocated - impossible to access to it To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1787822/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs