Prestashop 1.6 - Tracking Number Not Displaying in "Shipped" Template

[PrestashopEnthu]

Hi Prestashop Developers, 

I have created a module to insert tracking links upon new orders that uses certain carrier. I have checked that the tracking number is inserted in database and also found in Orders page. In database, it is stored in orders_carrier.

		$orderinfo = new Order($params['id_order']);
		$carrierinifo = new Carrier($orderinfo->id_carrier);
		if ($carrierinifo->name=='Standard Delivery') {
			$ordercarrier = new OrderCarrier($orderinfo->id_carrier);
			if ($ordercarrier->tracking_number=='') {
				$ordercarrier->tracking_number = $this->config['TRACK_PRE'].str_pad($orderinfo->id, $this->config['DIGI'], "0", STR_PAD_LEFT);
				Db::getInstance()->update(
					'order_carrier',
					array('tracking_number'=>$ordercarrier->tracking_number),
					'id_order='.$orderinfo->id
				);

I cannot fathom why the tracking number is not displayed in "Shipped" template. It will only be successfully displayed if I click edit (under the shipping tab in Orders page) and re-save the tracking number. (When the tracking number is already saved and displayed in Orders page). This is the extra step and I am omitted from automating this step.

Is there anyone facing the same problem?

Thank you.

[Guest]

Should use/modify in_transit template