External mic on head unit stops working when navigating

[dalboynz]

I dont know if this is an AA issue or a bug in my new android-powered head unit. The head unit has an external mic mounted on the dash and an internal one that is accessed via a button on the unit.
When I start AA and Maps is running I can use the external mic as per normal but as soon as I get Maps to start navigating, the external mic cuts off and I have to use the internal one.
When I tell Maps to stop navigating the external mic becomes active again.
Has anyone else experienced this behaviour?

 

[marchnz]

You don't mention the make and model of the unit. Is it AA or kanged Android/Chinese origin head unit.

 

[dalboynz]

Sorry, its called Atoto S8 Premium Second Gen so Chinese origin running Android 10.