Field values not showing up in folder view

[swt2c]

I am using Blacklight 5.16.3 and I recently added Blacklight Folders 1.0.1 to my application. When I add some documents to a folder and then view that folder, the page shows the documents with the list of fields, but the field values are missing. For example, it will list "Publication Date:" but show no value. I can see the fields being returned in the Solr request, so I think that part of it is OK. These fields are all added using config.add_index_field in my catalog controller. They show up fine in my normal search results page. Any idea why they don't show up in the folder view?