Rns-e Bluetooth problem

[radup1095]

Hello everyone! I have the following problem on my A3 8p 06'. I have the original Rns-e and Bluetooth module for calls only and need some help to identify the problem/error.

I connect my Phone to rns e bluetooth, make calls, everything works fine until I disconnect the Phone. Then my speakers start a looooong beep and can't shut it off no matter what. The only way the beep stops is when i switch off the car battery. Did anyone has this kind of problem?
If needed i can post a video.
Any info is much appreciated. Sorry for my bad english😁.

 

Kind regards!