Hello,
I have logged into your website.
The breadcrumbs displayed fine as they should be. You have set the categories to be displayed on the shop page then the categories have subcategories and then the customer can see the products and the breadcrumbs are generated on their basis and displayed fine.
This is the default behaviour and not an issue. If you want to change the settings of breadcrumbs, you can use the Yoast SEO plugin for that. Please read the below article:
https://yoast.com/help/implement-wordpress-seo-breadcrumbs/
Regards.
Xtemos Studios