I just had an issue with beolab 8s , but I think it was my own making .
But one quick thing worth looking at when you have the issue :
Move your hand over the top to make the lights come on .
The Bluetooth and mic symbols are only on the primary .
If yours have switched primary speaker , usb will not work as it is to be plugged into primary .
Note : I believe the left/right primary switch was caused by myself rather than software .