On update_status() have no order_items in email

Hello!
Quesion about order pre-moderation
$order->update_status when there is a new order

in functions.php

function my_status_pending($order_id) {
   $order = new WC_Order( $order_id );
   $order->update_status("processing");
   $order->add_order_note("Заказ создан, пожалуйста, ожидайте, подтверждения.", true);
}
add_action( 'woocommerce_new_order', 'my_status_pending',  20,2  );

With this code, all email notifications of this order sending with no items
screen

If you manually change the status of the order from the admin list of goods becomes visible.
link

What could be the problem?

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