I have a Sonos Arc and a Vizio M55-C2 (2015 ish). When I plug the Sonos into my HDMI ARC port (HDMI-1) and turn on CEC my TV recognizes the Sonos but when using the Sonos App to try to setup the TV it gives the following error: “A device is interfering with the HDMI connection. Disconnect any other home theater products, then try again.” I have disconnected every else except the Sonos and still get this error. I have reset the Sonos to factory defaults a few times and unplugged/replugged the cable between the two and still no luck. Any suggestions?