Hi @ezbis,
The ICON stack shows the featured image set to each Portfolio item. I have checked all your Portfolio items and there is no featured image set to any of them. I would suggest you set the featured image and check if that resolves the problem.
I have also found an ongoing issue with the Masonry layout which has already been fixed in the upcoming release. I went ahead and added the following code as a temporary solution under Theme Options > JS.
if (window.jQuery.xIsotope) window.jQuery.xIsotope.settings.animationEngine = 'css';
Which will prevent the jQuery errors and restore masonry functionality.
Thanks