When I came across https://math.meta.stackexchange.com/questions/29796/why-is-this-low-quality-review-ended, I immediately came up with a simple explanation: The person who initially flagged the post retracted it! However, it's not listed [here][1] or [here][2]. So can this trigger the ending of a review?


  [1]: https://meta.stackexchange.com/questions/164288/when-is-a-post-removed-from-a-review-queue
  [2]: https://math.meta.stackexchange.com/questions/27559/what-clears-a-low-quality-flag-and-what-removes-a-review-from-the-lq-queue