WP_User_Query ignoring ‘meta_query’ arguments

So, I’m trying to do a query on ‘members’ based on some inputs from a form using AJAX.

The thing is that when searching for a ‘role’ I get the expected result. But once I try to look for other meta values, the return bring all members in the DB.

I tried in a bunch of ways but I either get the result I just said, or I simply get no result at all (even with the role)

Here is my PHP code that is inside ‘functions.php‘:

function my_ajax_filter_search_callback() {
    header("Content-Type: application/json");

    if(isset($_GET['name']) && !empty($_GET['name'])) {
        $name = sanitize_text_field( $_GET['name'] );
        $searchName = array(
            'search' => $name,
            'search_columns' => array( 'first_name' ),
            'compare' => 'LIKE'
        );
        $searchName[] = array(
            'search' => $name,
            'search_columns' => array( 'last_name' ),
            'compare' => 'LIKE'
        );
    }

    if(isset($_GET['keywords']) && !empty($_GET['keywords'])) {
        $keywords = sanitize_text_field( $_GET['keywords'] );
        $searchKeywords = array(
            'key' => 'keywords',
            'value' => $keywords,
            'compare' => 'LIKE'
        );
    }

    if(isset($_GET['countries']) && !empty($_GET['countries'])) {
        $country = sanitize_text_field( $_GET['countries'] );
        $searchCountry = array(
            'key' => 'country',
            'value' => $country,
            'compare' => '='
        );
    }

    if(isset($_GET['disciplines']) && !empty($_GET['disciplines'])) {
        $discipline = sanitize_text_field( $_GET['disciplines'] );
        $searchDiscipline = array(
            'key' => 'disciplines',
            'value' => $discipline,
            'compare' => '='
        );
    }

    if(isset($_GET['roles']) && !empty($_GET['roles'])) {
        $role = sanitize_text_field($_GET['roles']);
    }

    $args = array(
        'role' => $role,
        'meta_query' => array(
            'relation' => 'AND',
            array(
                'relation' => 'OR',
                $searchName
            ),
            $searchKeywords,
            $searchCountry,
            $searchDiscipline
        )
    );


    $user_query = new WP_User_Query( $args );

    if ( !empty( $user_query->get_results() ) ) {
        $results = array();
        $count = 0;
        foreach ( $user_query->get_results() as $member ) {
            $member_info = get_userdata( $member->ID );
            $results[] = array(
                'id' => $member->ID,
                'name' => $member_info->first_name .' '.$member_info->last_name,
                'role' => $member_info->roles,
                'keywords' => $member_info->keywords,
                'country' => $member_info->country,
                'disciplines' => $member_info->disciplines,
            );

            $count++;
        }

        echo json_encode($results);

    }

    wp_die();
}

I even tried creating all the structure for the arguments in the same place to be sure that there is not an extra ‘array’ or something, same result.

Here is an example of my return when looking for a name:

And here is an example of my return when looking for a role:

The fields I’m trying to search were added with the plugin Paid Memberships Pro and that info is located on the ‘wp_usermeta‘ table. Here is a print of one of those fields ‘discipline‘: