The PDF is likely being stored in both cases -- one way you can tell is [Stored] appended to the title in the Item Details pane when selecting the item. If so, Item | Open Document (Ctrl+J) can be used to open the PDF externally to UR.
Can you send the info from
https://www.kinook.com/Forum/showthread.php?t=3038
It sound like UR is displaying the text content for the PDF that it could parse text from, but I would need to see how you have things configured in order to determine that.