bluetooth headphone not in audio devices

Hi, Not for the first time, I have trouble connecting a headphone as an audio device. In my case, it is a SennheiserLE-PXC 550-II. Up till now, in these cases I ignored the problem, until some new snapshot made it automagically go away. I can make a bluetooth connection to this device, and it is referred to as an audio device, but it doesn't show up in the list of audio devices. Pipewire doesn't see it, either. How can I convince the system to treat it as an audio device? I'm on TW, yesterday's snapshot. Any help would be greatly appreciated! regards, Jogchum