@support This somewhat scientific observation just in: after playing with a million parameters I move the Sonos boost out of the cabinet where it was right next to my NAS and my router. I just got a longer ethernet cable and put it about five feet away for the moment. So far, all the transport loss problems seem to have stopped. I have for more than half an hour jumped constantly between my Sonos zones and my Denon and moved from very high quality music to AAC and back and then to the radio and then to lossless etc. No problem. I am not sure WHY this would make a difference but it seems to have done so.