I suspect the bug first appeared with the introduction of the Nvidia driver because that switched you over from Wayland to Xorg. So this might be a Xorg-only bug.
** Changed in: mutter (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/2052859 Title: Windows go to behind others when clicking with mouse To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2052859/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs