On 3 January 2020, an Airbus A321neo crew found that the boarded passengers were seated such that the flight could not operate within the allowable flight envelope. Necessary reseating followed with a safety report filed. An internal investigation with State Investigation Agency awareness found that a systemic company IT issue was enabling invalid outputs. When the same aircraft’s inbound flight from Bristol was checked, a similar but undetected error was found to have resulted in that flight having operated outside the allowable flight envelope. Pending a permanent fix for the computerised load control system, manual checking procedures were immediately implemented.