This may be an odd post but so be it. I'll start by saying I love making NPC wars for fun. However, as of late I've noticed an odd occurrence. I'll usually pit every faction (College of winterhold, thieves guild, dark brotherhood) against an NPC like Tsun or the Ebony warrior, but I've noticed eventually one of the factions will turn on me for some reason even if I'm not fighting at all and just watching. Has anyone ever experienced this and is there a solution of any sort? Just think it's odd and messes up the fun of it. Any help would be appreciated. Thanks.

Maybe you have some mod related to the factions, that can interfere with your play style !!!!!