Bluetooth audio media disabled by default

A

AC Question

I have a Samsung Galaxy A3 running on Android MArshmallow 6.0.1.
I connected it to my car via bluetooth and got the media audio enabled at first connection, everything working fine.

When I come back to my car, the phone connects again to the car but without the audio media, just for phone calls and contacts.
The only way to have it working again is by turning off the bluetooth on the phone, and back on again. I have to do this every time I come back to my car.

Does anyone already face the same issue ? Do you know any fix ?

Thanks