//yoast breadcrumb product
add_filter( 'wpseo_breadcrumb_links', 'wpse_100012_override_yoast_breadcrumb_trail' );
function wpse_100012_override_yoast_breadcrumb_trail( $links ) {
global $product;
if ( is_singular( 'product' ) ) {
$breadcrumb[] = array(
'url' => get_permalink( get_option( '' ) ),
'text' => '',
);
array_splice( $links, 1, -3, $breadcrumb );
}
return $links;
}