First time I’m experiencing this issue in my market. Trying to tune into the NFL game tonight but Channels, on both tvOS and Android TV, will initially only decode a still picture and appears to hang. If I leave it be on Android TV (Shield TV device) it’ll eventually start playing as expected, but it takes nearly 2 minutes to do so. Even then however, there’s no audio. On tvOS (2021 Apple TV 4K), the video never recovers, and there’s also no audio playback. Other ATSC 3.0 channels are currently operating as expected. It’s been a few weeks since I last tried to watch the NBC ATSC 3.0 signal, but during the Olympics things were mostly fine.
Edit: same issue observed on iOS