Steps to reproduce:

• add download list paragraph to a page.
• edit paragraph configuration
  • set document link = /openwfe/openwfe-technical-presentation
  • set file extension = pdf
• save dialog

Expected result - dialog list displays openwfe technical presentation (PDF, 174 KB)
Actual result - dialog list is empty

After some investigation it appears that the issue is in DownloadListModel::116.

Changing

if(node.getItemType().equals(ItemType.CONTENT)){
    expressions.add("jcr:path like '" + link + "/%'");
}
else if(Document.isDocument(node)){
    expressions.add("jcr:path like '" + link + "'");
}

to just (i.e. removing the if/else condition)

expressions.add("jcr:path like '" + link + "/%'");

seems to resolve the issue.