I was participating in a thread and somehow during the upgrade / maintenance window, something strange happened to the posts that were posted during a specific period of time.

See this thread (post number 857). Posts 841 - 855 are just gone. But I posted one of those and if I go to my user dashboard and click on "My Posts" and navigate to it, it loads a version of the thread that has those posts again (here's a direct link to one missing post). But every time I load it directly from subscribed threads they don't appear.

Cache consistency problem?