Reciprocal relationships do not follow the order of the admin

Hi Anh,

When I get the reciprocal relationship fields they seem sorted by post_date and they no longer follow the admin order.

Admin
Frontend

new WP_Query(
    array(
        'relationship'   => array(
            'id'   => 'posts_to_posts',
            'to' => get_the_ID(),
        ),
        'nopaging'     => true,
    )
);

Cross relationship fields works fine. I’m not sure if there are any additional parameters that I need to add to get the administrator order. Thanks!