@carljandersonit is getting closer to working as expected in my car.. with my phone. I still get some stuttering, especially if I am not navigating, but just having the map in focus. However, when i am navigating and the map is in focus, when I change to Spotify, I am not able to use the center commander button and must use the touchscreen while moving. I may try with another phone at lunch time today.
CMU - 59.00.546 NA
Phone - OnePlus 7 Pro (Tmobile phone, but with GM21AA firmware) Android 10.
Download again and reinstall fw55-59 only.zip make sure u have the latest app of google maps/waze/AA. After navigation just focus on music screen for non-stuttering.