Tinker board S R2.0 - Audio Output settings changed after USB detached event

[lionel 0]

Hello, 

we found the following problem on Tinker board S R2.0 with Android 7 Nougat V14.4.0.22:

The audio output set to "HeadSet" changed to "HDMI" after an USB detached event (usb flash drive for instance).

We can see the following message in the logcat: "system_process I/UsbAlsaManager: USB Audio Device Removed: null"

Any idea? 

Thanks a lot!