Bluetooth microphone stops working during SFB calls
I have three different Bluetooth headsets paired with my laptop - each one featuring two separate audio profiles, 'Stereo' and 'Hands-Free AG Audio'. I tested all three handsets with SFB app (365 MSO 16.0.10730.20348), and the same issue keeps popping up: I start a Skype call, and after a few minutes, I get the "Your microphone is not working" error message and the other party cannot hear me anymore. Before I start a call, I connect a Bluetooth headset and make sure it is selected in SFB's Audio Device Settings. At this stage, I can see that the microphone is working fine (I am only able to select 'Hands-Free AG Audio' profile). So I start my call and after a few minutes the microphone stops working. When the issue pops up, one of my Bluetooth handsets disappears from the microphone selection list in FB's Audio Device Settings, though I am able to switch to the laptop's built-in microphone. The other two Bluetooth handsets stay on the list of 'available' microphones, though the microphone is not working in both cases. However, I am still getting the audio feed through the Bluetooth headset (i.e. it is only the microphone that stops working). If I disconnect the SFB call and start a call again, I can use the Bluetooth handset's microphone again - for a few minutes. The fact this happen to three Bluetooth headsets, points to an issue with SFB and/or Windows. I am running Windows 10 on HP Spectre x360 Convertible ap-0000na. All device drivers are up to date. Audio Troubleshooter does not find any issues with the system.