Jitsi Desktop hangs in Properties Editor #749

STR with Version 2.10.5550 (German) on WIN 10:

1. Launch Jitsi Desktop App
2. Click ˋ Werkzeuge (Tools) → Einstellungen (settings) → Erweitert (extended) → H.264ˊ
3. Use [DownArrow] to move selection down one by one until you will habve reached "Eigenschafteneditor (Properties Editor)
4. [DownArrow]
   » Expected: highlighted selection moves down to "Gesprächsaufzeichnung (voice recorder)
   Actual: Nothing happens, none of the buttons or similar will work. 😥

After a while (½ minute or more) jitsi becomes responsible again.
No unusual CPU load or memory consumption.

This ist nearby 100% reproducible for me.

Situation where it hangs: