Audition CC 2017 export saving wrong metadata

I've been batch exporting 24/96 FLAC files to 16/44 FLAC and every time I do it the metadata is changed to something completely different, it's from another file altogether, and the same metadata gets saved every time no matter what I export. Same title, track number, album etc. on every track.

I've tried cleaning the shared media cache database but that didn't help. I've been through the forum and settings in Audition and I'm stymied. Where could this metadata be coming from? I've done this before and didn't have this issue. Could it be something to do with a recent CC update?

Thanks for any insight,

Joe