Part of my clip won't play despite showing waveform

I recorded a multitrack session from a concert I was running sound for. One of my tracks will not play about 3/4 of the way through. But it does show the full waveform. It will play most of the track, but when I get to the final few songs, this track goes silent. It's the purple track I need.

Is the file corrupted? Why? How can I fix it? If Audition still sees info in the waveform the data should be there somewhere right?