P1207R4 ("Movability of single-pass iterators") introduces the notion of a move-only non-forward iterator and makes some changes to the existing specification to realize that support.

The problem is that the specification of make_move_iterator() provided in [move.iter.nonmember] p6 does attempt to construct a move_iterator<Iterator> with an lvalue of i instead of an rvalue, having the effect of copying it instead of moving it, thus preventing to accept move-only iterators.