WooCommerce, Lazy Load, Thumbnail Images and North One Page Parallax

[ Moved to the Fixing WordPress sub-forum. ]

Good evening,

I am having major issues with a site I manage.

Site address is www.ryobi.co.za

If you navigate the shop (Products) you’ll notice that the Sub Categories load correctly but once you go into the subcategories and view products, often the thumbnail images do not pull through and I cannot figure out why. This happens more often when navigating to page 2 of a subcategory. What strange is that if I reload, the images show up perfectly, it’s only when navigating from page 1 to page 2 of products.

I have attempted the force regenerate thumbnails and this does not seem to work.

I thank you for any assistance given.

Theme: North One Page Parallax (ThemeForest)
Plugins: WooCommerce, Lazy load for Woocommerce

Can anyone assist with a solution?