There are a couple events that are bugged in the game, I can't remember which ones they are, some events do require you to actually sleep in the bed to trigger, for the screen freezing, I don't know what would cause that, first time someone has mentioned it. Even in my game, when you try to save a scene for later, it always puts me in free roam. This isn't like Ren'py, it saves differently in Unity, it's not the mod per se, it's the engine that drives the game.
Be careful editing the save file, you can mess up events in the game sometimes, some events change two or three variables when you progress, if all of the variables aren't correct you can't progress.