Liberty Air 2 Pro on Android, microphone not connecting

This problem seems to be intermittent on my phone and suddenly got more frequent a couple of days ago. Previously people I called never complained of microphone problems but now everyone is telling me I sound far away and muffled.

I became suspicious that the phone microphone is being used instead of the headset microphone, so I did the “walk away from phone while recording” test. I can confirm the phone microphone is being used, not the headset microphone.

I just did the unpair > reset > pair process and I’m still having the issue.

One more bit of information. Previously Google Recorder would give me the option of which microphone to record from: headset or phone microphone. Now that option has disappeared. It seems the phone does not register that this headset has a microphone.