Why is the link to the last item missing in Laravel 5 pagination?

Question

Laravel

Hello.
Changed the nesting level of entries from site.ru/category/cat-name/article-name/ to site.ru/article-name/
Corrected the receipt of categories in horseradish crumbs, since earlier they were pulled through the url, now through the relationship in the database entries to the heading .
Everything was displayed normally, but the link to the last category in the new posts (where the first level of nesting) disappeared.
In the article, breadcrumbs are displayed like this:

Breadcrumbs::register('article', function($breadcrumbs)
{
    $request = Request::getRequestUri();
    $breadcrumbs->parent('cat');
});

If you add the name of the record there:
$breadcrumbs->push($title);
Then the link starts working, and the name of the record is added accordingly, without a link.
But in old posts, the title of the post becomes a link to the main one.
What could be wrong?