Yes, I understand. But I struggle with it. The clearest interpretaion is that the crew sat for 3 minutes asking for NU and the a/c held its stalled attitude more or less constant through the descent for all those minutes. There are some who may wish to argue that the crew in fact wanted ND but the 'system' frustrated their attempt, but I see no evidence for that intent or that obstruction. Could it be that they just gave up ?
Edit: perhaps as an SLF I should wind my neck in, as they say, but the upshot is the a/c was stalled - clearly and obviously to the a/c systems- but it failed to convey that one vital piece of information to the crew despite all its cleverness and left them guessing for 3 minutes of descent in the turbulent darkness.