Hi

I happened to run into a strange bug. I'm in the middle of my Slaanesh campaign, defeated the other 3 powers, got Archaon. But now my faction leader, Sigvald, had his model change into that of a khornate champion all of a sudden. It also seems that he lost his HP increasing traits and ancillaries, because now he dies too quickly, before even 5/6 of his bodyguard are wasted (keep in mind he should have like 15-20 hp in total).

Is there anything in particular that triggers this? I would like to get the old Sigvald model back