Issues with Import-PWDocuments

I'm running into issues with Import-PWDocuments. We've been using it for some time now to mirror a server location into ProjectWise to provide select external access to a large set of information. The dataset is roughly 200K files, 50K folders, and the sync usually takes 30-40 minutes each night to verify and sync the delta. The problem we're running into is that the sync thinks it needs to sync the same ~700 files (plus whatever legitimate file additions / modifications there may have been).

I have checked the length of the overall paths (<261), the length of the filenames (<128), and the length of each of the folders (<64). I thought maybe it was an issue with a special character, or some weird file modification date/time discrepancy, but didn't see anything that stood out. I can provide the logs from my last month of sync operations, but would rather not include them in the post.

Thanks for any assistance you are able to provide.