Phantom audio introduced when using Enhance Speech feature on audio clips

This is the third time I have sent a video to a client only to have it randomly generate phatom sounds on the talk track of my video. Instead of treating each clip in my 3 minute sequence, I typically nest the sequence then apply the Enhance Speech feature (which I previously did through adobe.podcast.enhance) so had to render out and run through that. Now that feature is built right into the essential sound panel in premiere (brilliant) BUT not if I am going to get weird audio overlap. So my question is...is there a duration limit on using that feature? My video is 3 mins long with 31 (talking)audio clips. Should I be using a different workflow? The remix feature? Please advise as I have lost confidence with this feature.

Window 10, 64 GB Ram, 8TB SSD.