Pages not indexed due to redirection on RankMath Sitemap

This is happening an all category pages apparently due to a redirection set on the sitemap. Do note I’m not using the build in “Strip Category Base” from RankMath, But instead the following code to strip it.

function modify_category_link_defaults_proyectos($termlink, $term_id) {
    $ancestors = get_ancestors( $term_id, 'category' );
    $parent_cat = array_values(array_slice($ancestors, -1));
    $term = get_term_by('id', $term_id, 'category');

    if ((empty($ancestors)) && ($term->slug == 'proyectos')) {
      $base = get_bloginfo('wpurl');
      $termlink = $base . "/" . $term->slug;
      return $termlink;      
    }
    elseif ((empty($ancestors)) && !($term->slug == 'proyectos')) {
      return $termlink;
    }
    elseif ($parent_cat[0] == 3) {
      $base = get_bloginfo('wpurl');
      $termlink = $base . "/" . $term->slug;
      return $termlink;
    }
    else {
      return $termlink;
    }

}

add_filter( "category_link", "modify_category_link_defaults_proyectos", 10, 2 );

I did try deactivating this code on functions.php and using the above RankMath preference but it didn’t achieve the same, I could still see the categories with “/proyectos/” in the url (the idea is to only have the post category name).

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