What's wrong with Secondary menu on WooCommerce product card page?

Question

WordPress

Weird situation.. Creating a menu

<?php
        wp_nav_menu(array(
          'theme_location' => 'sb_menu',
          'walker'         => new My_Secondary_Nav_Menu_Walker,
          'container'      => false,
          'menu_id'        => 'secondary-nav',
          'menu_class'     => 'secondary-nav',
        ));
      ?>

where class My_Secondary_Nav_Menu_Walker extends Base_Nav_Menu_Walker
On all pages of the site with a menu, everything is fine, but on the product card page (single-product.php), the class is no longer taken into account and the menu theme disappears .. can anyone come across something like this?