I recorded a clip on my phone, which demonstrates the problem. Shows up at 0s, 12s, 22s. This is CBC Vancouver on channel 100 during a comedy show. The moment the image froze, I pressed "Record". Power cycling the unit by unplugging/replugging didn't help. It doesn't recover - the video just keeps stuttering.
This is not tolerable. Telus should admit that there is an issue and if it needs the help of the community to debug it, then provide the guidance on how to turn on the diagnostics, on screen, during the broadcast.