MaybeWas the same yesterday with this thread:
https://forum.paradoxplaza.com/foru...-hearts-of-iron-community-livestream.1395313/
The thread was always unread and it was impossible to write in it (said server error or something.)
After a while (maybe 2 hours) it was possible to write in.
Maybe it's some kind of announcement posting that is always on top and unread until some time?