description for FB share of category-sites is "Inhalt abgelegt unter Taxonomie "

When I want to share a category from my woocommerce shop on facebook, the title-tag of the category appears correctly, but the description is always “Inhalt abgelegt unter Taxonomie ..” Where can I set that parameter? I did enter a meta description for the category but it doesn’t show that one!
When I share a single product the description of the product appears when I click on the facebook share button.

Thanks for your help

strangely, it only does not work on that product-category page: https://www.cheaperia.ch/index.php/produkt-kategorie/occasion/

on that one for example it works:
https://www.cheaperia.ch/index.php/produkt-kategorie/dekoration/

https://www.ads-software.com/plugins/add-to-any/