Hi,
The module is right displayed and the related products are right displayed.
The issue is related to the HTML/CSS.
For an unknown reason, the product listing is display in a
<div id="portfolio" class="super-list variable-sizes clearfix isotope" style="position: relative; overflow: hidden; height: 440px;">
And with the hidden overflow + the CSS to force the size on "auto" with a relative container.. The final size of the block is "0px" height.
So the content is there, you just don't see it.
Regards,