CarPlay on 2019 BMW X5 call switches to phone

While using CarPlay, via wireless, on BMW 2019 X5, on any phone that’s connected, the audio of a phone call, and only a phone call, switches from the car to the phone. Initially you think the call has dropped, but you simply can’t hear the other person through the car audio. The call is still connected and the caller on the other end can still hear you (likely through the phone’s microphone?). You can pick up your phone and switch back and forth between CarPlay/phone/back to CarPlay and it reconnects to CarPlay and plays through the car audio.

This happens right in the middle of a call and happens frequently. It happens on any iPhone that’s connected, any operating system.

Any help??