I have the most recent 2-tuner HD Homerun, with one antenna input, and I have that set as a higher priority than my TV Everywhere source. On two Apple TVs, Channels ignores the sources on the HD Homerun (if I check using Stats), and is pulling from my TV Everywhere source instead. My iOS devices correctly use the HD Homerun.
Any thoughts on what to check to fix this? I don't have any client settings for sources in the DVR, so all clients use the same channel Collections. I checked, and the source is listed in the Channels app on the Apple TV.