EU4: Why is the personal union ending

europa-universalis-iv

I am playing as Aragon and I have a personal union with Castile. My ruler is called "Alfons VI de Trastámara". Everything is well, Castile's opinion of me is 200, and I have just started to integrate them.

However, now I got a popup saying that my Personal Union ended because "Alfons VI de Trastámara of Castile has died". And I get the restoration of union casus belli. But when I go to my court tab, I can see that King Alfons VI de Trastámara is still alive and well.

So, why did I get a message saying that the king of Castile has died, when we're in a personal union? My king is ruling both nations and is still alive. Is this a bug?

I am playing the 1.23 Persia patch with the Cradle of Civilization DLC installed.

Best Answer

It turns out that their capital was besieged by rebels, and Castile accepted their demands, overthrowing my as their king. The text in the popup just didn't make a lot of sense.