Starting May 1, some threads in favorites are highlighted red. When I click on them, I discover that there are no recent (unread) replies. Today, May 2, they are still highlighted red.
Yes, I go to Following, then Saved Topics. Just now, I got only one new one (Melissa Clark) and then several had the red mark but no new comments in a very long time. Like this one:
Opening them up does not make them go away. And, they are all expanded. Never had this problem before.