I am facing with similar problem. I have Thinkpad T14 with COWIN bluetooth headphones. When I turn ON the headphones,it automatically connects. However the sound still comes out of internal speaker. When I go to output devices the headphone is not in the list. I have to disconnect and reconnect again to get the audio to the headphones. I tried the suggested solution from #1866194 i.e. deleting ~/.config/pulse and restarting. Also I have pulseaudio v13.99.1.
I am facing with similar problem. I have Thinkpad T14 with COWIN bluetooth headphones. When I turn ON the headphones,it automatically connects. However the sound still comes out of internal speaker. When I go to output devices the headphone is not in the list. I have to disconnect and reconnect again to get the audio to the headphones. I tried the suggested solution from #1866194 i.e. deleting ~/.config/pulse and restarting. Also I have pulseaudio v13.99.1.