Bluetooth headphones not seen in phonon device list

Hi all,
I used to be able to configure Tumbleweed so that, when I connect my bluetooth headphones, all sounds would automatically be sent to the headphones.
To do this I reordered the device list under System Settings -> Multimedia -> Audio and Video. But now, I only see “Default” under the device list.
Note that the headphones work correctly if I force the sound to be sent though them by using e.g. pavucontrol. And I see the headphones listed in the Volume widget in the tray. But I cannot set the preference because the device is not present in the list under System Settings -> Multimedia -> Audio and Video.
What am I missing?

Thank you in advance
Cris