Ideas
The autonomous fighting just started happening in my legacy save as of last night. I never have used mods or cc and the last update I did was the Nov 4, 2025 one which I did a couple weeks ago (I play offline for awhile after updates) & I played for a number of hours with no issue before this started. Both of my sims had active fears and one was a ghost so idk if that could be contributing at all but idk why it would.
The autonomous flirting which has been going on since the update (maybe before too can’t remember, I don’t notice that one as the sims I’m currently playing with have no jealousy and are either polyamorous or in open relationships or single) is a bit annoying but not a huge deal but now randomly sims with good relationships or who have just met and are having a nice conversation or with no relationship are randomly either fighting my sims for no reason or fighting each other or the vendors in food stalls.
If this keeps up it could be game breaking because one fight and the sims immediately despise each other with a full or mostly full red bar.
It is very much like what happens when a spellcaster sim gets the curse of unwanted hostility except these are not spellcasters and definitely not cursed.
My sims are not hot headed, mean, evil, etc they do not have any traits that should trigger this and I keep NAPs turned off so it’s not that.