Would a new result in pre-print be considered by reviewers? [D]

So I have a bit of a weird question; suppose you were reviewing a paper. The paper is otherwise ok, but you notice that the authors left a giant elephant in the room unaddressed, either experiment wise or theoretical result wise. But then you become curious and you look up the paper to see if there is an arXi version. You see that the authors did than address the elephant in the preprint version.