Do you have gtk3-nocsd installed? It is supposed to be disabled for Gnome session. But it is not working properly.
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1745070 Title: Decorations/headerbars are broken in bionic: double bar in Xorg logins and missing in Wayland logins To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-themes/+bug/1745070/+subscriptions -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
