Moto G3 - Suddenly no sound during calls with bluetooth

[AC Question]

Everything was working fine until recently, but now there's no sound during calls when connected through bluetooth.
Problem happens:
- Only DURING calls
- Only using Bluetooth (both headset, or car).

Only solutions I find involves turning off "OK Google", but that feature is already disabled (can't change, since it says it's not available in my language).

I have of course checked bluetooth volume, and made sure the bluetooth device is selected during call.

Anyone know what's wrong?

 

[B. Diddy]

Welcome to Android Central! Go to Settings>Bluetooth​, select the headset, and make sure Phone Audio is checked on.

 

[JonTV01]

I have the exact same problem. I have two moto G3 the first stopped working during calls 3 days ago. Today the second phone stopped working.