War that cannot be ended?

So this seems like a new bug from the latest update, anyway I've never had this before. I got a war that's going on that will not end. The wargoal is at 100%, I cannot enforce my demands, I cannot surrender, and I cannot do a white peace. It's a war I started, so I should be able to. I even tried switching to the leader of the other side to surrender from there, and none of the 3 options are available either. I tried letting it run for a few years (100% wars usually end by themselves) but it's not happening either. I got no choice but to abandon this game now... Anyone had this?