Xfinity won't display 4K UHD
I have a 4K tv with the proper Xfinity 4K box (xg1v4).
I have set the inputs on the tv to turn ON "UHD".
But for some reason, when I try to watch a 4K UHD movie, tv show or whatever on Xfinity, it will only show in regular 4K. BUT, if I go to Netflix or Roku or some other input, the UHD works!
Can anyone explain why shows on Xfinity won't uptick to UHD if the show is shot in that format?