Hi there. Since yesterday I've noticed an issue with Tabbers on my wiki. They don't appear in Preview anymore, yet are fine on the page and can be edited. I think it might be because of the recent update but I'm not sure. I had one of my Rollbacks test it, as well as another Admin and they both had the same issue.
Wiki in question: Danganronpa Wiki
Page used for the example: Kaede Akamatsu