WTH Just Happened?

I just pulled up my "What Are You Reading Now" groups board and instead of the two or three threads that are normally at the top, there are dozens and dozens of topics, many dating back literally years with hundreds of unread posts.

WHERE IS MY "WHAT ARE YOU READING THE WEEK OF..." THREAD?

Sometimes the order is changed. You want to change it back to 'Last Message'.

No, there is something else. For a few minutes I had really old topics at the top of my Talk list, one was from Jan2020. It wouldn't be up there if it was just by date instead of Last Message. It then flipped to the right listing of talk topics, but it was weird for a minute.