Galaxy S9 Plus and Android Auto: Bluetooth audio disconnects during phone calls

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A

Android Central Question

Car: 2017 Honda Civic EX-T
Phone: Samsung Galaxy S9 Plus

Phone is connected to the car using USB, as well as Bluetooth.

1 hour commute to work, so I use Google Maps for traffic, and Spotify for music.

For about 1/2 of my phone calls it seems, I will drop Bluetooth audio after about 1 to 3 minutes into the call. Also, the map disappears. I end the call, and I have to unplug the phone and plug it back in to correct the issue.

Not a good thing when your driving at highway speeds.

Anyone else experiencing this issue or have a fix?

Other details:
Phone model SM-G965U
Hardware version REV1.1
Android 8.0.0
Samsung Experience version 9.0