Elasticpress: Multisite search is not working

Hi, I have tried to search across of multi domain in wordpress, but result is not coming from the second site, it always takes results from 1st site. I have go throught the several documentation, but still it is not working, but the data is showing in Elastic search.

I have user Elastic version 7.8
Elasticpress version is: 5.x

The query I have used is as given below:
$args = array(
? ? ? ? ‘s’ => $s,
? ? ? ? ‘posts_per_page’ => -1,
? ? ? ? ‘ep_integrate’ => true,
? ? ? ? ‘sites’ => array(1, 2),
? ? ? ? ‘post_type’ => $post_type_array,
? ? ? ? ‘post_status’ => ‘publish’,
);

The page I need help with: [log in to see the link]