Please try live booting Ubuntu 19.04 from USB (http://releases.ubuntu.com/19.04/) and tell us if it has the same problem.
If the same problem exists in 19.04 then please report it to the Gnome Shell developers as a new issue at:
http://gitlab.gnome.org/GNOME/gnome-shell/issues
and then tell us the new issue ID.
Please try live booting Ubuntu 19.04 from USB (http:// releases. ubuntu. com/19. 04/) and tell us if it has the same problem.
If the same problem exists in 19.04 then please report it to the Gnome Shell developers as a new issue at:
http:// gitlab. gnome.org/ GNOME/gnome- shell/issues
and then tell us the new issue ID.