War bug

Hello. After installing 1.9, I've been noticing this bug that, well, bugs me to no end. Okay, I've been playing the Blackfyre Rebellion after install, It's one of my favorite bookmarks. After I win as Daemon Blackfyre, and took the iron throne, I'm given the option to arrest any of the lords that have fought against me in the war. I always choose to arrest the opposing Lord Paramounts. Almost always, this leads to more wars, ones harder than the Rebellion, but not unwinnable. But, after installing 1.9, and winning the rebellion, I'm once agant given the option to arrest them. I chose to arrest them. Then I recieve a notification that I am now at war with the lords... Except I'm not. It immediately ends, after the declaration. No one gets arrested, not loses any titles, no one calls any soldier, nothing happens... But a declaration of peace... What? Eversince I've downloaded the update, this happened more than one, not just in my Blackfyre playthrough.