The OP appears to be asking whether the NIP being delivered to an address that was updated with the DVLA after it was posted, and possibly even before it was delivered, and was received anyway somehow invalidates it or negates lawful service.
The answer is no.
If anyone (other than the OP) wants to explore or question the reasoning behind that statement, or otherwise externalise their own lack of knowledge or logical reasoning, they are free to start a thread in the Flame Pit to do so.