In my case it was a real trash "Seicane". Weird thing was that it plays fine until you turn the ignition from ACC to ON so it might be some sort of signaling issue.
Actually there is a very simple solution - visit your local dealer and request a bluetooth module replacement. The USB playback is via the BT module and a new version of the module has been released that solves the playback issue. There is a TSB for this fix but I don't know the number. The...