You are absolutely right and an issue I raised at the launch of NEC4 as the problem has not been addressed. All you can do, to make sense of the situation, is use the Accepted Programme current at the point in time immediately before the effects of the event started to impact the programme. That must, logically, be what is intended (although the contract will not take you there). You should then update the programme to the point of impact and consider the effect (again the contract doesn't actually take you there).
This is a big problem area and if you have fallen into it you will need to get creative and find some advisers who can et n board with such a creative approach.
This is a big problem area and if you have fallen into it you will need to get creative and find some advisers who can et n board with such a creative approach.