I too recently have this same issue.   None of my TV's will play Pandora as stated above when connected by way of Xfinitiy/Comcast.   After talking to their tech, I picked up a new X1 box thinking that this would solve the problem, but it does not.   When I use Roku versus the blue voice control, Pandora runs great.   Xfinity/Comcast could not find anything wrong with my account or system.  Hope a solution is found soon.    ... View more