You can get “magic” shows if the Left and Right portions are out of step with each other. When one wave goes up, the companion wave goes down. This can cause the show to cancel under the right circumstances.
Open the show in Audacity. Use the left-hand drop-down menu and Split Stereo Track. Select one of the tracks with the SELECT button and Effect > Invert. Select the top track > Same menu system > Make Stereo Track.
Does the problem go away?
I’m making a bunch of assumptions. Stop me anywhere.
Some phones only have one loudspeaker: converting everything to mono. Like Koz said, that can cause cancellation of some/all of the show via destructive-interference …