I have 3 Sonos Amps and am connected to a new Samsung TV (HDMI). When I turn on the TV the Sonos will play in the TV Room but is erratic in allowing me to join the other rooms. When I try to join other rooms the Sonos switches the source to the Music sources while the TV plays silently. I can use the Xfinity remote to get the HDMI TV again but only through one room. I have to restart the TV and Sonos App to have it play in multiple rooms. It is really hit or miss. Not what you want in a high end system. Any ideas?