METV processing error - windowboxing on channel 1156 in Portland OR

The problem isn't on my end, it's on Comcast's end. Don't think I can explain it any more clearly than I did above. I am watching through my cable box and METV is the only channel affected. Picture seems to be normal on Xfinity Stream App - aspect ratio is correct, picture fills screen top to bottom. Through cable box, even the commercials don't fill the screen from top to bottom, just side to side.

It's not with the TV box, the problem is with how Comcast is translating the broadcast through their cable network.

I don't know if it is specific just to Salem Xfinity customers, or to everyone who receives Portland station KJYY 29.3 on Xfinity channel 1156.

Thank you for letting us know the issue remains persistent with channel 1156, @user_8xg7f0. Please send our team a direct message with your full name, the name listed on the account (if different), and the service address associated with your account. We will be more than happy to further research this issue. 
To send a Direct Message, please click on the “Direct Message” icon in the top-right corner of the screen, next to the bell icon click the "New message" (pencil and paper) icon then type or select "Xfinity Support". Type your message in the text area near the bottom of the window and press Enter to send your message and initiate a live session.