For the past week I am unable to watch any live TVE or Locast channels on the channels DVR app on the Apple TV. I get “Tuner not available” on all channels. I can stream normally on the iPhone app and the web app. If a program is being recorded, I can watch the recording in progress from the guide without problems. I recently had an HD HomeRun on the network when the problem was also occurring but I have deleted that from the DVR server and restarted it without any change.
Sometimes when I delete the channels DVR app and reinstall I can get a stream to work temporarily. I have submitted the logs via the Apple TV app.