Not a long time ago, users discovered that installing the latest version of Android Auto on their phones isn't exactly a good idea, as the whole thing broke down Google Maps, making the app get stuck on the loading route screen. The good news, however, is that not a lot of users have been impacted by this problem, though a full fix to bring things back to normal is yet to be released even today.

Link: Google Maps No Longer Feeling Like Home on Android Auto
via http://www.autoevolution.com