So… after digging a bit more regarding my issue, I stumbled over a GitHub Issue(s) which are showing the problem which I have also. It looks like that xdg-desktop-portal-gdk
makes problems maybe connected with some D-Bus stuff. I already tried one thing from this but it didn’t helped unfortunately…
I’ll read through the others later if I have time.
If anyone has some suggestions to try, I’ll really appreciate it! Thanks in advance.