When going through DevForum categories you will see a message that says “See 1 new or updated topic”, once clicked nothing happens. I presume this is from people using actions that do not bump a thread, ex. Hearting posts / Bookmarking posts
I don’t think it’s a bug, I think it’s a new topic being made in bulletin board. You cannot see posts in bulletin board, so that explains it. But it probally is or probally isn’t, so I’m not 100 sure. Just a guess.
It says new or updated which means that someone probably posted in a different thread. I’ve seen this happen in #collaboration:recruitment and if you scrolled down, you would’ve seen a ‘1’ bubble appear next to one of the threads.