Show Category Hierarchy Not working

Hi there,

Please see this page: https://arcadesnackdev.wpenginepowered.com/product-category/nuts-seeds/
Whenever I enable “Show Category Hierarchy”, no categories are displaying on frontend. Screenshot:

If I disable this option, it all looks fine:

The site is using recent version of Divi theme and no plugins other than this one & WooCommerce. Please help.!

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