Isotope gallery not always working properly - html

Question

I am working on a isotope gallery, and sometimes its not working properly, i needed to refresh the page a few times because i made some changes to the front end, and i saw that the portfolio works different on each refresh.
EDIT: only does this on Chrome.
this is how it should work:
but sometimes it does things like this:
Here's the link to the website, and here is my isotope gallery code:
i left out a few items, since i found out it doesnt matter how much items i put in the gallery.
<!-- section works -->
<section id="section-works" class="section appear clearfix">
<div class="container">
<div class="row">
<nav id="filter" class="col-md-12 text-center">
<ul>
<li>Alles</li>
<li><a href="#" class="btn-theme btn-small" data-filter=".photo" >Foto's</a> </li>
<li>Video's </li>
</ul>
</nav>
<div class="col-md-12">
<div class="row">
<div class="portfolio-items isotopeWrapper clearfix" id="3">
<article class="col-md-4 isotopeItem photo">
<div class="portfolio-item">
<img src="img/portfolio/img1.jpg" alt="" />
<div class="portfolio-desc align-center">
<div class="folio-info">
<h5>Portfolio name</h5>
<i class="fa fa-expand fa-2x"></i>
</div>
</div>
</div>
</article>
<article class="col-md-4 isotopeItem video">
<div class="portfolio-item">
<img src="img/portfolio/img6.jpg" alt="" />
<div class="portfolio-desc align-center">
<div class="folio-info">
<h5>Portfolio name</h5>
<a class="fancybox" href="js/jwPlayer5/player.swf? file=http://localhost/plusbus/img/portfolio/videos/files/vid1.mp4" type="video/mp4" title="local video mp4"><i class="fa fa-expand fa-2x"></i></a>
</div>
</div>
</div>
</article>
</div>
</div>
</div>
</div>
</div>
</section>

Answer 1

Without code it is a bit of a guess. You are using isotope v1.56, not v2, you need to use Isoptope v1 imagesloaded info.
This is how you use it:
var $container = $('#container');
$container.imagesLoaded( function(){
$container.isotope({
// options...
});
});
For isotope v2, you would need to load imagesloaded.js separately since it is not included as it is in v1.5