I've been following a duplicate proposal of another user recently, and voted to close the question, but later I changed my mind and retracted the close vote.
What bothered me is that the automatic upvote that came with my former close vote isn't automatically retracted as well, and I can't even do that manually (I know that for any regular comment upvote there's a grace period).
Here's what I see:
The tooltip at the comment upvote says
You've voted for this as a useful comment.
But with my close vote retraction, it's clearly no longer the case that I find that comment useful.