No audio stream was recorded 3 times in 2 weeks

Channel 7 (ABC) Denver randomly has audio with 90+ signal strength from tuner. All other channels have audio in my testing.

I have rescanned multiple times, as test with setup using WinTV Tuner X2 Both cards tested independently same results.

Audio in playback settings as “None” using web, smarttv app, or windows app. If I stop and start the channel up to 5 times or more I can get audio eventually. This behavior is seen when watching live TV, and when DVR use recording live TV.

Can provide logs, but I am at a loss. Suspect that when live tv session is started the ffmpeg transcode process is attempting to selected preferred audio channel and if not successful just drops all options and proceeds with nothing.

Please advise.