Problems with breadcrumbs and Generatepress

I am using Rankmath version 1.0.49 and the free version of GeneratePress.
I noticed that the breadcrumbs are displayed incorrectly. The breadcrumbs will not only be displayed in the respective article, but also on the homepage of the blog.
It looks like this:
Title of the article
Breadcrumbs
Extract from the article
Heading of the next article
Breadcrumbs
Extract from the next article
etc

You can see this on my blog https://pokern24.org

Why are the breadcrumbs also displayed on the home page? I don’t really want that. How can I remove this from the start page?

In the functions.php I added the following:

add_filter ('the_content', function ($ content) {
   if (function_exists ('rank_math_get_breadcrumbs')) {
     $ content = rank_math_get_breadcrumbs (). $ content;
   }
   return $ content;
});