Screen is blank but audio plays at beginning of recorded program playback on Roku

[billybattablotv1]

Per Tablo question at https://community.tablotv.com/t/sound-but-no-picture-on-some-recorded-shows-roku-3/6014:

My recording quality has been 2 and 3 mbps . Not sure what year but are 4200x and 4230x as noted above.