Enabling and then disabling the menu bar again through the in-window context menu makes it go away, but this needs to be repeated for every new window.
Uninstalling appmenu-gtk (having already uninstalled appmenu-gtk3 without improvement) seems to fix the problem.
Still happens for me here (running gnome-shell).
Enabling and then disabling the menu bar again through the in-window context menu makes it go away, but this needs to be repeated for every new window.
Uninstalling appmenu-gtk (having already uninstalled appmenu-gtk3 without improvement) seems to fix the problem.