I am trying to use a cloud VM as my host.  The host and guest are Linux.

Host:  Ubuntu 22.04 server with mate-desktop and x3goserver installed

Guest:  Fedora 35

When the guest connects, I get a desktop.  In the upper left corner, I get a Menu.  When I click on the menu, a sub-menu gets displayed.  However, it disappears before I can select anything.

How can I make the menu work correctly, i.e., stay up until I select something?

Thank you.

Blake McBride