Alert over API - not receiving all values


we have successfuly set up alerts for these 2 flight ids:

and we received the POSTs on our server.

However we seem to be missing 2 events:
the departed for the first one was not called.
the arrival for the 2nd one was not called.


i think for the first one we registered the alert too late, so the departed could not have been called.

that still leaves the arrival event not being delivered for the 2nd flight.

It looks like the flight id KLM1763-1530509164-airline-0164 was cancelled in favor of of an updated id due to call sign disambiguation. This means that there would be no further events alerted for the given id. However, the actual flight was not cancelled, so a cancellation message would not be sent.