When I listen to music via Bluetooth in my car, why does my phone start to vibrate?

[AC Question]

while using bluetooth for music the phone virbrates

While listening to music via Bluetooth in the car, my phone started to vibrate,this started a few days ago, that has never happened before. I have had galaxy 6 edge since it was first released. The vibration only happens in the car via Bluetooth, not while listening to music directly from phone.

 

[B. Diddy]

Re: while using bluetooth for music the phone virbrates

Welcome to Android Central! It continuously vibrates, or does it repeatedly? Is it constantly getting Bluetooth pairing requests?