So I've noticed my Galaxy S7 sometimes auto-launches the Android Auto app when I start my car. Other times it doesn't for some reason. But the app just lauches on my phone and doesn't relay anything to my NEX4200. Yes, I know it should be plugged in. But two questions:

 

1) Why does it auto launch sometimes and not others?

 

2) Why would anyone want it to launch on their phone, but not show on the screen? Why would I want my device limited to what Android Auto can do without any of the benefits?!?!