This may be related to https://bugs.launchpad.net/ubuntu/+source/gnome-tweaks/+bug/1847136 since the reporter in that bug also refers to issues with the title bar.
This may be related to https:/ /bugs.launchpad .net/ubuntu/ +source/ gnome-tweaks/ +bug/1847136 since the reporter in that bug also refers to issues with the title bar.