No, it had more than one downvote when I upvoted it, i.e. stayed grey after upvote. Moreover, I just saw it being black, then grey, then black. So it still rece

No, it had more than one downvote when I upvoted it, i.e. stayed grey after upvote. Moreover, I just saw it being black, then grey, then black. So it still receives a mix of downvotes and upvotes. Very strange.