Cannot place voice call over bluetooth
After the update on iOS11 I cannot place a voice call when my iPhone 6s is connected to my car's bluetooth. All the other BT functions are OK (I can place and take calls from the steering wheel, listen to music etc.) and "do not disturb while driving" is set to manual.
I tried to pair the phone from scratch but nothing changed. Strangely, when bluetooth is disconnected, I can place voice calls from the phone.
This thing is very annoying (and dangerous), because in order to place a call I have to find the name in the catalogue.
Any ideas guys?
iPhone 6, iOS 11