Take the Luxul out and use the Xfinity Gateway. I know this is against everything we do, but when those things are in bridge mode, something still acts wonky. I tried an ERL, ABR4400, and still had issues with AirPlay, Sonos, and UPNP on Sony Receivers with Music Connect. Used the router/modem from Xfinity and it works fine. My assumption is that bridge mode on certain models of the xfinity router are not 100% bridged. Between Xfinity and FiOptics they are f-ing killing me.