How do you restore missing compound clip audio?

In my documentary project, I create compound clips for each scene to keep my timeline clutter free. One of the compound clips in the documentary timeline won't play back audio. I tried decomposing the compound clip and there is still no audio. The track is not muted nor has it been automated. Other compound clips that are on the same audio track play back normally. Does anyone know why there is no audio and what I'm doing wrong?
I should add that when I open the compound clip in its own timeline, the audio is audible and plays back normally. The only work around I've found is copying the compound clip into a new timeline and then the audio can be heard. I would rather not have to rebuild my documentary timeline.
I should add that when I open the compound clip in its own timeline, the audio is audible and plays back normally. The only work around I've found is copying the compound clip into a new timeline and then the audio can be heard. I would rather not have to rebuild my documentary timeline.