We are doing an accessibility audit for our Omeka S site and got flagged for missing alt text on this page: Unraveling Workers’ Letters: The Voices behind Nelly Don · Lynn Davis · Digital Exhibits @ UMKC Libraries. It looks like the two thumbnails for page 1 and page 2 are not rendering with alt text even though it has been added in the media alt text field. In fact, the alt text is displaying as captions in the viewer. Is there something we can do to get the alt text to load for those thumbnails? Thanks!