You can update the firmware?

 

I had the same issue on my Porsche, so it's not really an AM interface problem. Leads me to believe it's either the Bovee software or Bluetooth syncing in general that gets confused when both connections are simultaneously trying to handle the phone calls. As mentioned though just setting the Bovee Bluetooth connection on your phone as media only eliminates the problem.

I am still having a weird issue though on my Pixel when I start playing music, it restarts my phone. Happens rarely so haven't taken the time to figure out what's going on yet.