METV processing error - windowboxing on channel 1156 in Portland OR

Xfinity in Portland, Oregon, is improperly windowboxing METV (channel 1156, Portland LD station KJYY 29.3). Their program content, which is entirely in the 4:3 aspect ratio, is being distorted into a 16:9 aspect ratio. Instead of being pillarboxed, there are black bands on all sides. Commercials, which should appear at 16:9, look like they are at 64:27, and have black bands at the top and bottom. I understand that this is a re-encoder processing error. 

When METV was on Xfinity channel 302 in Portland, it was properly pillarboxed.