Poweramp seems to respond quite differently to my car's bluetooth adapter (CoolStream CarPro) than other media players I've used which is somewhat annoying to me. Neither Groove Music nor Google Music will start playing audio immediately upon starting my car, but they will stop the audio immediately when the car turns off.  They will also stop the audio if I switch to a different input such as radio on the vehicle.  This is the behavior that I want to have but I can't seem to get it with Power