The most terrible issue I have faced so far is a creation a new titles on succession. I was holding almost full territory of Scandinavia as Denmark (with only single king-tier title of Denmark). Once my ruler has died, Kingdom of Norway was created and given to non-heir son effectively splitting my realm in halfs. Luckily I was able to press my claim on Norway. But now I have two kingdoms and all duchies de-jure drift is reversing
This doesn't look correct to me. I don't mind duchies and counties going away to other sons, even top-tier titles may go away if it exists - this has happened in history of russian slavs for example. But I can't understand how the king dies and suddenly some of his sons announces a creation of new kingdom taking the half of old one. Without any revolts or something like that. It also happens free for him, cause if I want to create kingdom myself, I have to pay piety and money.
P.S. I hope it is possible to delete titles via console and reattach some person as a vassal of someone else? Cause I don't want to spend all my precious resources on first conquering the territory back, then destroying titles which costs so lot (and breaks de-jure drift).
P.P.S. Have not found this in bug forum, so creating thread there.