I have problems with the search query using multiple post types

Hi i found my my problem it was polylang that causes the problem
i need to add sopport for products to polylang settings so my fast fix was just to add
‘lang’=> ” because my site is only in English at this moment.

<?php $args = array(
            's' => $searchterm,
            'post_type' => array( 'product','post', 'page'),
            'posts_per_page' => $max_posts_per_page,
            'orderby'   => 'date',
            'paged' => $paged,
            'lang'=> ''
        );