I ran several updates the other day and noticed, my media library is not displaying all uploaded pictures anymore. This issue happens in Both grid and list view. I checked the Web-FTP and the pictures are still in the uploads folder and are also visible on the products and pages…
In this case, we suggest you to create a development copy of this website where you will be able to test everything without additional plugins and switch between themes. In general, our theme doesn’t influence this functionality and can’t cause this problem.