Unable to use bluetooth headphone for phone calls with android Pie update

[Android Central Question]

I used to use my bluetooth headphone with my pixel 2 for phone calls.
After the new update, the phone still connects to the headphones and can play media without problem but when I try to make a call I can't hear or speak through the headphones.

Phone calls is already switched on in the device settings.

 

[Rukbat]

Open the Bluetooth page when the headphone is connected. Tap the gear to the right of the headphone line. (If you don't see it yet, there may be a "connected devices" item you have to tap first.) Then see if phone is enabled. If not (which is probably the case) enable it.

 

[B. Diddy]

Welcome to Android Central! When you say that phone calls is already switched on in the device settings, are you referring to what Rukbat was recommending?

Are any other Bluetooth devices that also allow you to make calls connected to the phone at the same time?