Linux - GUI not shown since 3.1.1

after I see the new client is build I hope I got the solution for this problem:

Yes, jitsi is working again, but I’ve direct an new issue:
When I activate the tray Icon the gui doesn’t work anymore. First I think it should something with the settings and move the settings awy and setup the client new. But after activating the tray Icon the GUI didn’t come up.

After I install of the 2.17.11 again the Client work again.

It is on my linux KDE neon 5.20 Desktop, it is based on ubuntu 18.04.