Hi,
I see what is the problem.
It comes from the carousel display on your page.
Change the line:
<div class="hikashop_carousel_item <?php echo $borderClass; ?> hikashop_subcontainer" <?php echo $data; ?>>
to:
<div class="hikashop_carousel_item <?php echo $borderClass; ?> hikashop_subcontainer" <?php echo $data; ?> itemprop="itemList" itemscope="" itemtype="http://schema.org/ItemList">
in the file components/com_hikashop/views/product/tmpl/carousel.php and that will fix the problem.
we'll add that patch on our end too.