Missing bits of VO and "pops" on exported wav file

Hello all, hoping someone could give me some insight to my problems.

I am a video editor who recently started using Audition to do small audio mixes using the essentials panel. I will give my workflow and then my problem. In Premiere it was just one layer of interview audio and one layer of music. I used the "send to audition" menu to send to Audition. Once in there in a multi-track session I did all my tweaks using the essentials panel and remixed the music to fit and key framed it up and down under the voice track. That's it. I listened back to it and was happy. I went file, export, export multi-track, selected wav and left all the settings at default.

Once exported and pulled into Premiere, random bits of the voice track are missing, you hear the person talking, its disappears and comes back. The background music is still there and the voice is gone then it comes back after a few seconds. It was in three points within my 2min 30sec video. Then there were also "pops" in the audio on each of my audio edit points even though both in Premiere and Audition there were none when playing back. Back in my Audition project it still sounds fine when played back.

Any idea what would cause this and any ideas how to solve it?

If of any use my machine is a PC, Dell T7600 workstation, Windows 10, Dual Xeon Hex core processors, 64GB Ram, Firepro W7100 gfx card. Audio is run through the integrated sound device the machine came with whatever that is.

Thanks in advance.

Cheers

Tim