Problems with the Product list

Dear Sir or Madame,
I installed the plugin, everything works fine. If I select a variation at the product list the box-text box-text-products enlarged! This is only happening if I defined only one variation for example color and not color and size. How can I solve this problem because it overlaps the next product in the list. I hope my description was understandable.
Please have a look at https://www.equimunich.de/produkt-kategorie/pferd/

Kind regards
Lukas