I am playing as Byzantine Empire now and I just attacked 3 independent Duchies in Sicily, which won independence from Kingdom of England. I've had 2 claimants for those territories there so I put them on the throne as my vassals, last claim I used with de jure Empire. I didn't have Kingdom of Sicily, same as England didn't got it. For few years it was peacufully there. After this problem appeared in Duchy of Apulia - my vassal. There was a Duke there with 2 provinces and his one vassal countess in 3rd county from this Duchy. This countess made a faction and declared war against her liege - and my vassal Duke of Apulia. Problem is that she declared war for a claim of... King of England. Hold a moment, how it is possible that she was allowed to press a claim of foreign, independent territory ? And I coulnd't do nothing with it. I couldn't imprison her, I couldn't revoke her title, I couldn't join my vassal war. And this war wasn't only against Duke of Apulia, but also against my rule there, cause if she would won, Kingdom of England would get it. Pathetic situation - county outside me to put any claimant on throne must declared war against me. And here is situation that she wass pressing foreign claims and I couldn't no nothing. Ok, I could excomunicate her, but due to medium Crown Authority noone wouldn't attack her. I solve the problem, but it wasn't a sollution as I wanted - I've sent much gold to Apulia, reloaded as it, bought mercenaries, returned to my Byzantium and I was paying for Apulian mercenaries. But it wasn't a sollution I wanted - honestly, I think this is not working as it should. Revolt like that should be against me, or T should got at least some possibilites to stop her....