Duplicates when publishing from SharedShelf/JSTOR Forum

When I publish images from SharedShelf/JSTOR Forum to Omeka, multiple batches of duplicate images get published, over and over. This started last week (around March 28). I have disabled the SharedShelf plugin for now, but I would like to continue using it if possible. Thanks for your help!

I’m using Omeka Classic 2.6 and SharedShelf 2.0.

I am having the same exact problem but using Omeka Version 2.5.1. Thanks!