Had that issue intermittently too. No idea what fixed it. Might have been cycling watch off then on again?
I'd already cycled. I did figure out what the issue was. Hate to admit it... I'd put on a "Healing Shield" and didn't take off the tiny bit that should have come off over the microphone. It didn't help that every picture I looked at showed the microphone being somewhere else.
All sorted now though.