Last Wednesday i received the 8.1 upgrade together with the April security patch.
Ever since my Bluetooth has issues:
In the car i can pair with my phone, but after 5 minutes it looses the call ability; only music is available.
I deleted my pairing info, repaired with the car, but the same result.
I went to the garage and they checked the car computer => I've got the latest firmware and all is working fine.
I tried with another phone (I still have a Nexus 6p with Android 8.1 & April security patch) and no issues.
When i go to the phone menu of my car computer it says 'no provider' and therefore i cannot receive nor make calls in my car.
Does anyone have the same issue?
UPDATE: I did a factory reset and - for now - the bluetooth issue is resolved