Deezer volume goes to 50% when connected to car bluetooth

Hello ​@Dadoooor apologies for the late response.
Is this problem still happening?
Do you use Android Auto or Car Play in your car?
Thanks

Hello, yes, it’s still happening.

I don’t use either AA or CP, just plain old Bluetooth ;).

To better understand the volume decreases in your car speakers?
Thanks

Yes, that’s correct.