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 arXiv version. You see that the authors did more than address the elephant in the preprint version.

Question — do you now give the authors a pass on not addressing the elephant, expecting that they would include it in the camera ready, or do you pretend the arXiv version doesn’t exist and grill the authors for not addressing the elephant knowing full well that they in fact did in an updated version of the manuscript.

p.s. asking for research purposes, of course I am not the author in this story, ppffft