Some of us have a better beta experience than others.
“And here’s reason number 249 not to install beta software onto a device that’s critical to your everyday life. Android Auto users who have upgraded their Nexus phones to the latest version of the Android N Developer Preview are reporting that Google Maps navigation is no longer working in the car interface. (Remember, Android Auto isn’t an independent system – it needs a powered-up and connected phone in order to work.) The Maps app is simply crashing on launch and returning users to the Auto home screen.”
The good thing is, it is high priority.