Rows not filled up on product catalog page

Hi all, I have an issue with my product catalog pages. I am running the Flatsome theme, and have all plugins, themes, etc updated to the latest versions.

I have set my site to show 4 products per row on desktop, with a total of 52 products per page. However, for the shop and under all categories, the pages aren’t filled with 52 products. There are blank spaces of about 2-3 products at the end of a page, and some pages only feature 1 product.

Any help with this issue is very much appreciated!

The page I need help with: [log in to see the link]