OK, I couldn’t help myself, and checked GItHub. Seems the issue may have been fixed hours ago. Don’t know when the new version will ship though.
Seems the issue may been to do with the process that updates the ranks of posts not being able to catch up to older posts, and so they show up with out of date ranks/scores. That process has been optimised, apparently, and should have no problem keeping up with all of the posts.