I've seen the exact same in my reviews of some PRs on my team. The one with the static array and tests of presence/absence in this array is often appearing for some reason.

The most insulting: I once commented on the review that the test wasn't testing anything, an my colleague promptly launched his skill on my review and let claude remove the test. He didn't even read my comment.

Our hierarchy pushes for unrestricted AI use; now I just stop reading and refuse to review that kind of shit.