I have given up on the Android Auto launcher software mentioned above.. to many inconsistencies, slowness, crashes, etc. I'm using FCC Launcher (the beta) w/premium subscription and that is actually making it bearable. The stock launcher stinks big time.
if I want to do nav + audio streaming, I'll connect via Bluetooth to my phone and use that for the map. I can control the audio from the Headunit (it's actually streaming from the phone as well but the controls for track skip are on the big screen).
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