The carrier webhook is delayed today; how can we hold off on WISMO tickets?

Today, customers were asking 'Where is my package?' in large numbers. The backend showed it as shipped, but the tracking page was still stuck on 'label created.' Customer service thought the 3PL hadn't handed it over, so I first checked the 3PL handoff scan, carrier manifest, and webhook queue, only to find that the packages had already been handed to the carrier, and it was just a delay in…