iOS auto-plays audio via speaker whenever my car turns off.

Hey all,

I did some searching but couldn't find anything with a similar title.

Every time I turn my car off (2016 Subaru Legacy), my iPhone 6 running the latest iOS 9 starts playing the last thing I was currently playing (in this case, the Kindle app). I just did a few tests just to see when/why it's doing this.

I just got in my car (nothing was currently playing on my iPhone), turned it on, and never selected Bluetooth Audio as the source at all. It was just on the radio. Went for a quick drive, turned the car off, and sure enough my iPhone started playing outloud through the speakers.

I've read elsewhere that it's car-related, but wouldn't the car only be able to auto-play when it connects, not when it disconnects from the phone? Once the car is off, how can it tell the phone to play? It must be that the iPhone somehow thinks that I want to continue listening (even though I wasn't listening in the first place).

Of course this also happens when I actually am listening as well.

Any ideas? Thanks!