Just to clarify:
It looks like you set things in such a way that when we load save game world needs to “update”. There are two problems here, first is that this updating isnt done while loading the actual save (we need to let some time pass for things to appear) and second when this update happens the parties that were in battle seem to re-issue battle command – so if autosave spawns me on top of caravan (friendly) being attacked by orcs (hostiles), i get called into battle the same way when you attack multiple small bandit stacks they all get called into a single battle if they are nearby.