Just won a war where I got a overlord and his vassal as new vassals. A few weeks later my +100 loyal vassal just declared war and changed his empire name and symbol. Is this a bug or what's happening?
V: 3.5.3 R: 8.2.0.0
Xbox Series X
All DLC enabled


V: 3.5.3 R: 8.2.0.0
Xbox Series X
All DLC enabled