The timetable is not the route duration: terminal queues, cancelled sailings and waiting on the vehicle deck form separate blocks of time, and the TBX's cold chain of up to 24 hours is used up by the sum of those blocks.

ScenarioRecord
Normal sailingPlanned sailing, terminal arrival, actual departure
Delayed sailingWaiting location, recipient notice
Missed sailingReturn decision and its owner

Log lid openings during the wait as well: frequent or long openings affect the container's temperature.