When I sit in my car and listen to music from my phone via bluetooth, an incoming call appears.
The music mutes and the call is going on.
After ending the call, the Venu starts unintended playing music on its loudspeaker!
Several seconds later, the music from my phone unmutes and goes on playing on my cars radio. Like it should be.
Then I have to start the music app on my watch and pause/stop it.
This only happens on incoming calls. I´ve not determined this habit on outgoing calls.
This is also still happening to me.
It seems that the "old" cable bound Android Auto causes this. On newer versions over WiFi, it does not happen. Additionally to that, it also starts the watch music player…
Today I received an answer from Garmin.
Just more then a year later...
We're following up on the report we received that after starting a call while your Venu 2 Plus was connected to your phone, your call…
Today I used the Voice-Assistent by accident and canceld it.
The music on the watch starts immediately afterwards 
I don´t know how hard it can be to store that the music player was actively started and…
Hi Garmin-Sara
thanks a lot for your reply!
If I can give you more information or test something, please let me know!
Today I received an answer from Garmin.
Just more then a year later...
We're following up on the report we received that after starting a call while your Venu 2 Plus was connected to your phone, your call's audio would eventually transfer automatically to your watch or your phone without taking any action on your part to cause this. With the release of version 16.11 of the Venu 2 Plus system software, a new feature enabling you to disable your watch's call audio is now available on the watch itself. This feature is found on the device under Settings > Connectivity > Phone > Call Audio. If you're still experiencing the problem, please use this setting to disable your call audio function on your watch. Unfortunately, Garmin does not have the ability to control how call audio is routed on your phone as this is solely under the phone's operating system's control. If you only experience the issue while your watch is connected, disabling the call audio function of your watch should prevent the issue from recurring.
Which is a totally different problem. And it´s solution is to disable a feature, rather then make it work.
Nice move, Garmin 
Today I used the Voice-Assistent by accident and canceld it.
The music on the watch starts immediately afterwards
I don´t know how hard it can be to store that the music player was actively started and only then resume it after calls or using the voice assistent.
And this got nothing to do how call audio is routed on my phone 
