user_list_replacement.php

<?php
/**
 * Show WP author dropdown list
 *
 * @return array
 */
static function user_list() {
    global $cv_admin_users_list;

    if ( !empty( $cv_admin_users_list ) ) {
        $result = $cv_admin_users_list;
    } else {
        $result  = array();
        $show    = 'display_name';

        $args = array(
            'role__in' => [ 'author' ],
            'fields'         => array( 'ID', $show, 'user_login' ),
            'orderby'        => 'display_name',
            'order'          => 'ASC',
        );

        $users = get_users( apply_filters( PT_CV_PREFIX_ . 'user_list', $args ) );
        foreach ( (array) $users as $user ) {
            $user->ID        = (int) $user->ID;
            $display         = !empty( $user->$show ) ? $user->$show : '(' . $user->user_login . ')';

            $result[ $user->ID ] = esc_html( $display );
        }

        $cv_admin_users_list = $result;
    }

    return $result;
}

?>

key is line 17

just adding this