The contents of one of my audio tracks completely changes when I put it in Premiere

This is one of the strangest bugs I've encountered in Premiere.

I have an audio file which explains a crime case. At the start of the file it's describing a person and then at the end it's supposed to conclude the case, but at the end the audio returns to describing the person again, and it doesn't look like a glitch in the sense that the voiceover follows the audio waveform perfectly as though it was just recorded like that.

I open the track in the Music app in Mac and it's entirely different (it's normal and plays as it's supposed to). I've tried re-exporting the track as a different file type, different quality, different name, different folder, everything I can think of.

My last resort is to get back in touch with my client to reupload a new track but I'd like to solve it first if possible and just wondered if anyone's come across this before.

Tldr; the track I'm trying to use is perfect and plays find in the Music app but as soon as it's in Premiere it's like it turns into a different track.