Android Auto random volume changes and chimes

[JohnJones1960]

Greetings,

Samsung J7 Prime - SM-J72711
Android 8.1.0
Baseband - J727T1UVS5BSC2
Kernal - 3.18.14-14133265-QB22566678
Build - M1AJQ.J727T1UVS5BSC2
Ford Sync 3

Problem #1 - Volume goes up and down while streaming music (Amazon, iHeart).
It's similar to when Waze lowers the volume to deliver a message.
I tried the following:
Uninstalled Waze, still happens.
Disabled all app notifications, still happens.
If I bypass AA and stream via bluetooth the volume does not change.

Problem #2 - Chimes while speaking on phone.
Just loud enough to be annoying. It's a 4 note chime. Happens at random intervals only while speaking on the phone.
I have tried the following:
Bypass AA and speak via bluetooth, no chimes.

The former has been happening for months, the later is a new issue.

I have searched and searched for solutions, must not be common problems because I can find very little info these.

tia

 

[JohnJones1960]

Correction it's a 5 note chime

 

[JohnJones1960]

Well I restarted in Safe Mode thinking I would launch apps one at a time to try to see which ones are causing the issue.

Turns out Android will not allow me to launch downloaded apps while in Safe Mode.

They sure don't make it easy to track down issues.

 

[JohnJones1960]

There's a thread on google support about this issue:
https://support.google.com/androidauto/thread/3135591?hl=en