bluetooth headset unable to switch to stereo

I received a brand new Bluetooth headset from Sony. So, I paired it with my laptop, switched it to stereo and everything was great.
Then I rebooted my laptop and after it was not possible to switch to stereo again. The Gnome Sound Settings silently failed, pavucontrol at least reported an error.
From googling I have the impression that the problem comes from GDM - the display manager starts pulse-audio to for screen reading and this instance of pulse-audio interferes with the pulse-audio started in the user session - but I didn’t find a solution to my problem.
At the end I wiped my laptop and installed Fedora. Now my Bluetooth headset is working like a charm. Can somebody fix OpenSuSE so I can come back? I’m willing to help but I at the moment I don’t know where to start.
Kind Regards