Sound not playing on some clips Adobe Premiere Pro

There are just a few clips all next to each other where the sound stopped playing. No activity is showing up on the mixer for that clip. I check all the obvious things like mute, solo, the volume level under effects, etc., but nothing. I deleted the media cache files folder so it could all rebuild and nothing.

If I move the audio to a different audio track it will play, but it doesn't when I move it back to its original track. So there's at least that fix, but I'd like to know what the original problem is vs. having to use this workaround.