The current situation is dangerous if you receive a call in the car. You get a half baked connection to an unknown caller which you can only get rid of by fiddling with your phone. Not ideal at 80mph.
There is an ongoing support thread where multiple customers have asked for this bug to be fixed but support have now decided it is a feature request.
Just as a note please don't make the assumption that I use a desktop PC in my car as the support team did.