It was a nice day in the close queue, until I found this question.
At first, I thought it was mis-tagged since I was filtering on java and the question was about std::function<T()> (I know that Java generics are not that weird, despite many people being confused about them) .
When I tried to edit the question, I found that it was not tagged with java.
Verily, it had never ever been tagged with java.
Looks like the review you linked to was a review audit...
I've found when I'm going through the close vote review queue with a tag filter, review audits will have the tag I'm filtering on added/substituted in order to make the post look like it matched my filter.
Otherwise, it would be a dead giveaway that a post is an audit if the post doesn't match the tag filter you have set. (It may still be a giveaway that the post doesn't seem to be about your filtered tag, but at least that meant you attempted to read the post.)
Most likely an audit -- these have different tags. Due to limitations of the audit system, they can't actually filter for tags, so they just slap on your tags onto the question. Also, note the discrepancy between the vote counts.
This is just a guess, but perhaps Yakk accidentally edited in the java tag, realized that he had made a unicorn-grade mistake, and quickly fixed it within the 5 minute grace period. You were unfortunate (lucky?) enough to see evidence of a mistYakke during that very brief period in which it existed.
Congratulations.
