Hi Simone,
That is because the js file loading takes time. I report this to the developer too.
If you DON’T want the related product carousel, open up wp-content\themes\neighborhood\woocommerce\single-product\related.php in line #41, you see something like this
<div class="related products product-carousel" data-columns="<?php echo $woocommerce_loop['columns']; ?>">
change that to
<div class="related products" data-columns="<?php echo $woocommerce_loop['columns']; ?>">
also change the
'posts_per_page' => 12,
at line number 22, to 4
'posts_per_page' => 4,
Let me know, What you got.
Thanks,
laranz.