USPS Priority Mail Express International from Miami Florida to the UK - In Transit and Lost

Very often when USPS tracking status showing "In-Transit" for so long without any updates - there must be something wrong with the item. Below is an example USPS priority Mail express international delivery to the UK in Transit since last April 2017

Tracking Number: EZ027002725US

In-Transit
Product & Tracking Information

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Postal Product:
Priority Mail Express International™
Features:
Insured
PO to Addressee
Up to $100 insurance included




DATE & TIME STATUS OF ITEM LOCATION
April 8, 2017, 5:45 pm Departed LONDON, UNITED KINGDOM
Your item departed a transfer airport in HEATHROW, LONDON, UNITED KINGDOM on April 8, 2017 at 5:45 pm. The item is currently in transit to the destination.
April 4, 2017, 9:03 pm Departed MIAMI, UNITED STATES
April 4, 2017, 6:09 pm Departed MIAMI, UNITED STATES
April 4, 2017, 2:49 pm Arrived MIAMI, UNITED STATES
April 4, 2017, 7:47 am Processed Through Facility ISC MIAMI FL (USPS)
April 4, 2017, 7:46 am Arrived at Facility ISC MIAMI FL (USPS)
April 4, 2017, 6:10 am Arrived at USPS Regional Facility MIAMI FL INTERNATIONAL DISTRIBUTION CENTER
April 3, 2017, 9:51 pm Arrived at USPS Regional Facility MIAMI FL DISTRIBUTION CENTER
April 3, 2017, 7:50 pm Departed Post Office MIAMI, FL 33181
April 3, 2017, 3:06 pm USPS in possession of item MIAMI, FL 33181