During my campaign as Averland, around turn 50 Hochland turned Heretic. I quickly formed an army and conquered the whole of Hochland, destroying it in the process (faction leader and heir were in the last city I attacked).
After that, a script appeared that I can allow the restoration of Hochland. That whole text was strange, as it requested my armies to leave Hochland and go liberate Wissenland, that wasn't under attack.
Anyway, I clicked yes.
Nothing happened.
Then the Grimgor Invasion script started.
No Grimgor showed up. Not an army of Orcs.
Few turns later, Storm of Chaos script started. At the same turn I got the information that Chaos Undivided was destroyed and no stacks spawned.
I was very upset with that, because I didn't have any backup saves - that will teach me something.
Check the faction restoration script guys!



