Automatically generate random Post Slug for specific post type

add_filter( 'wp_unique_post_slug', 'custom_unique_post_slug', 10, 4 );

function custom_unique_post_slug( $slug, $post_ID, $post_status, $post_type ) {
    if ( $custom_post_type == $post_type ) {
        $post = get_post($post_ID);
        if ( empty($post->post_name) || $slug != $post->post_name ) {
            $slug = md5( time() );
        }
    }
    return $slug;
}

Specify $custom_post_type to make it work for a specific post type.

Customize the auto generation of Post Slug in WordPress – Stack Overflow

stackoverflow.com