I know that this is not a bug, so I am posting this part here.
With the massive english rebellion against their heretical king, I happen to have a Duke of Oxford, count of Besançon and vassal to the King of France, and a Duke of Gloucester, count in Germany and vassal to this King...
AI kingdoms finally granting dukes titles is actually a good thing, but I don't think such extreme things should happen, since it will now be nearly impossible to get back those titles for a would-be king of England like me...
With the massive english rebellion against their heretical king, I happen to have a Duke of Oxford, count of Besançon and vassal to the King of France, and a Duke of Gloucester, count in Germany and vassal to this King...
AI kingdoms finally granting dukes titles is actually a good thing, but I don't think such extreme things should happen, since it will now be nearly impossible to get back those titles for a would-be king of England like me...