Possibly linked, possibly not and I cannot give an example since the error(?) is ephemeral, but a few times in the last few days I have edited an old post in a thread, many many pages back and the thread shows up in my bookmarks then as having new posts. When I click on the NEW tag, I'm taken to a page somewhere in the thread seemingly unrelated to the edit I just made.
Clicking back to bookmarks sometimes makes the NEW tag go away, sometimes it remains, takes me to the same page in the thread again and then goes.
Its not the end of the world, just some behaviour I'd seen recently that I couldn't recall seeing before.