WP_Query shows wrong content Wordpress

I am trying to get data through WP_Query,

I've created a Ajax Search, but it's showing wrong pages (posts),

also when I directly visit link with s parameter, it shows the correct pages (posts).

example.com/category/success-stories?s=data

admin-ajax.php request payload:

action: search_checkbox_call
category[]: 81
search: data

Data I can see in Network > Response tab by print_r($args):

Array
(
    [post_type] => page
    [category__in] => Array
        (
            [0] => 81
        )

    [post_status] => publish
    [s] => data
    [orderby] => DESC
    [paged] => 1
)

AJax Response Code:

$cat_ids = $_POST['category'];
    $ser = $_POST['services'];
    $tech = $_POST['technology'];
    $ind = $_POST['industry'];
    if (($_POST['search']) !== '') {
        $s = $_POST['search'];
    } else {
        $s = '';
    }
global $wpdb;

$paged = $_POST['page'] + 1;
    $args = array(
        'post_type' => 'page',
        'category__in' => $cat_ids,
        'post_status' => 'publish',
        's' => $s,
        'orderby' => 'DESC',
        'paged' => $paged
    );

$new = new WP_Query($args);

Can someone tell me what's wrong in it?