I have a bilingual site. Since my last update my site no longer duplicates images that have been edited into the second language. They remain as original photos. I have checked with WPML and they say it is a cornerstone issue. This is the mail I have received from WPML about the problem.
From WPML
We have checked this issue. Let’s consider the URL of page http://example.com/x/#/content/8/layout?lang=en as you can see ?lang=en added at the end of URL whereas it should be added just before the # e.g. http://example.com/x/?lang=en#/content/8/layout because query string can be read only when it is placed before the hash.
Since language code in the query string cannot be read by WPML thus page language is French and displaying French media library. I have tested this without Cornerstone if I access with proper language information the media library is fine.
This workflow is controlled and designed by Cornerstone itself. It will be great if you can contact them to get it fixed.