Yesterday, I updated my Ubuntu 19.10 to 20.04. As usual, I connect my Bluetooth headphone to my PC and they got connected successfully, but even if I select my headphone as output device, I got the sound through PC speakers.
But later, I notice that I'm able to hear warning sounds (like terminal beep sound) through my headphone but not all sounds.
I tried to switch audio output configuration between A2DP sink and HSP/HFP, but it still didn't work.
Later, I think that its application based that terminal is able to produce sound through Bluetooth device but other application doesn't, so it tries to play an mp3 file through terminal with ffplay and it worked, but still it's not working for other applications (Firefox, Chrome and vlc).