I'm currently playing Aelnar, and have grown to have over 700 provinces in Aelantir. I've allowed the Revallians to have a presence in my empire for that institution bonus due to my distance from the likely locations from which said institutions will spawn. The current year is 1655, and when the even triggers for the Revellian Society to become the Revellian Church, my game hard locks and then crashes. I'm not sure if there is something I've done to cause this, or if a unexpected trigger is causing the game to hit a intense update tick that ends up causing the game to completely crash.