When I use Spotify with Android Auto the data usage is very high, despite the data saver being enabled.
At work, I can stream over LTE for 5 hours or so and use maybe 50MB. When I'm in the car, using Android Auto, the data usage jumps by about 10MB every 20 min.
The data saver feature is clearly not working with Android Auto - like it's being disabled. I've tried everything, reinstalled the app (clean reinstall), reinstalled Android Auto all without success.