Adobe PDF embed API not able to load more than one PDF in a RG?

Hi all. I’m using Adobe’s PDF embed API which is super simple to use. Just copy their embed code into an html element and it displays the PDF beautifully. However when I want to display multiple PDF files in a repeating group, only the first PDF is loading and the others won’t load. Any ideas or suggestions? Thanks for any help.

The embed examples: Adobe PDF Embed API Demo