Well, I disagree.
Law 17.6 (c) Scrum following maul. The ball is thrown in by the team not in possession when the maul began.
Its clear, its unequivocal and it is not contravened anywhere in the Law, except in the specified exception, when the ball is caught direct from an opponent's kick.
But Ian, that bit of law applies to an unsuccessful end to a maul. A b/c going off his feet is not a collapse, nor an unsuccessful end if the ball is available to be played immediately. Also the second para of 17.6 (g) is also applied to a maul that is on its feet and stops in the "reasonable amount of time" the ref allows for the ball to come out. In both these circumstances, if the ball is available to be played and is not played, I would award the scrum to the team not in possession regardless of whoever took the ball into the maul in the first place.