I was going through some close votes through the review queue, when it showed me this:
Which I had already voted to close on Feb 19, and so am no longer allowed to vote to close this again.
Why did it show up? Anyways, it looks like a bug.
I do see some duplicates, but they are all apparently bug reports which were fixed a long time ago, and this happened today, so not sure if I vote to reopen those old duplicates, or post as new bug, guessing the second.