Сейчас вот так формирует:
<ul class="breadcrumbs" itemscope="" itemtype="http://schema.org/BreadcrumbList">
<li itemprop="itemListElement" itemscope="" itemtype="https://schema.org/ListItem">
<a href="" itemprop="item"><span itemprop="name">Главная</span><meta itemprop="position" content="1"></a>
</li>
<li><a href="catalog" title="Каталог"><span itemprop="item"><span itemprop="name">Каталог</span></span><meta itemprop="position" content="2"></a></li>
<li><span itemprop="item"><span itemprop="name">Мешки для мусора</span></span><meta itemprop="position" content="3"></li>
</ul>
А нужно так:
<ul class="breadcrumbs" itemscope="" itemtype="http://schema.org/BreadcrumbList">
<li itemprop="itemListElement" itemscope="" itemtype="https://schema.org/ListItem">
<a href="" itemprop="item"><span itemprop="name">Главная</span><meta itemprop="position" content="1"></a>
</li>
<li itemprop="itemListElement" itemscope="" itemtype="https://schema.org/ListItem">
<a href="catalog" title="Каталог""><span itemprop="item"><span itemprop="name">Каталог</span></span><meta itemprop="position" content="2"></a></li>
<li itemprop="itemListElement" itemscope="" itemtype="https://schema.org/ListItem">
<span itemprop="item"><span itemprop="name">Мешки для мусора</span></span><meta itemprop="position" content="3"></li>
</ul>