GarageBand track automatically mutes at 5:04 minutes

In GarageBand, I am working on a interview recording. Im not sure what I did, but at 5:04 minutes, it automatically mutes one of the tracks on the recording. The track I recorded with my second mic, which was one and not muted, automatically mutes when it reaches the minute 5:04. And, when it does that muting of the track, the mute button on the left hand side of the screen changes to show that the track is muted, like I had pressed the mute button. I attempted to delete all automation on that track, by going to the Mix menu, however, after clicking on "Delete all automation" it is still muting automatically. Please help- I cant edit without being able to hear the track.