Call waiting problem when you connect the phone to the vehicle

My phone (iPhone) is connected to my vehicle via bluetooth. When a call comes in while in the car, the phone is automatically opened after ringing once and put into call waiting mode. It is annoying that the call is answered automatically and goes into standby mode immediately, without the possibility of answering the incoming call or throwing it into the network. Whatever I did, I could not solve this problem. I tampered with the phone settings and vehicle settings, but I could not solve the problem. What could be the problem?

can be software teacher. See if your smeg display software is up to date. I say.