This happens when an article is revived from the second-chance pool. From what I understand the only way they currently have to resurrect a thread involves chan

This happens when an article is revived from the second-chance pool. From what I understand the only way they currently have to resurrect a thread involves changing timestamps, which is extremely disorienting for people who actually did see the previous thread. See dang's explanation to the same question here (and his link to an algolia search of other previous explanations): https://news.ycombinator.com/item?id=36472976 https://news.ycombinator.com/item?id=36472976