'ShipperTrackingNumber does not update on OrderFulfillment message

The tracking number does not refresh on the Amazon webshop after OrderFulfillment message. What could be the problem?

I send in this with the request

<?xml version="1.0" encoding="UTF-8"?>
<AmazonEnvelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="amzn-envelope.xsd">
  <Header>
    <DocumentVersion>1.01</DocumentVersion>
    <MerchantIdentifier>A3R5BRHC1LSKJ2</MerchantIdentifier>
  </Header>
  <MessageType>OrderFulfillment</MessageType>
  <Message>
    <MessageID>1</MessageID>
    <OrderFulfillment>
      <AmazonOrderID>206-3080255-0391536</AmazonOrderID>
      <FulfillmentDate>2022-03-29T19:10:29+01:00</FulfillmentDate>
      <FulfillmentData>
        <CarrierCode>Other</CarrierCode>
        <CarrierName>Parcel Force - Next Day</CarrierName>
        <ShippingMethod>Standard</ShippingMethod>
        <ShipperTrackingNumber>776427581888</ShipperTrackingNumber>
      </FulfillmentData>
    </OrderFulfillment>
  </Message>
</AmazonEnvelope>

I get back this

<SubmitFeedResponse xmlns="http://mws.amazonaws.com/doc/2009-01-01/">
  <SubmitFeedResult>
    <FeedSubmissionInfo>
      <FeedSubmissionId>179552019080</FeedSubmissionId>
      <FeedType>_POST_ORDER_FULFILLMENT_DATA_</FeedType>
      <SubmittedDate>2022-03-29T18:10:32+00:00</SubmittedDate>
      <FeedProcessingStatus>_SUBMITTED_</FeedProcessingStatus>
    </FeedSubmissionInfo>
  </SubmitFeedResult>
  <ResponseMetadata>
    <RequestId>0b785678-99f1-4687-a6b9-ac2a3e2b23ab</RequestId>
  </ResponseMetadata>
</SubmitFeedResponse>


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Source: Stack Overflow

Solution Source