Stop two audio sources from playing at once

This response is of no help. This is annoying feature of the I phone. Please ad to the update a means to turn this feature off. It appears its a marketing ploy to always have Apple Music play. Just give us our phone back so we can decide which audio source we want to listen to. You are creating a driving hazard when the music highjacks the phone every time we try to adjust the volume killing off what ever we actually wanted to listen to. "Common On Man"

Hi there BrackGascho,

We can understand the concern of two audio sources playing at the same time while you're connected to Bluetooth in your vehicle. We're happy to provide some insight into this for you. When connecting an iOS device to a Bluetooth in your vehicle, music may begin to autoplay. This is expected behavior. So users aren't listening to silence, many stereo manufacturers will send a playback command from the stereo to the iPhone upon connection. There is no setting to disable this in iOS, however some car stereos might have the option to do so. If needed, you can refer to the stereo or vehicle manufacturer for further assistance.

We hope this helps you.

Take care and be safe.