Alright hope I'm doing this right.
I have two Sims who, granted, were enemies for the longest time... but I wanted them to be friends. However, if I put a friendly "chat" or "tell a joke" or anything that isn't mean in their queue with one another, they'll walk up to the other as if they're about to do the action, but then the action drops. They can do anything that's mean including fighting, yelling at, arguing or casting mean spells. But if it's something that might result in a positive reaction, it drops and they don't do it. They can be nice and do everything else with any other sim.
I tried resetting both sims and emptying their inventory but neither worked. I also tried loading without custom content and again, still the problem. I even tried using the cheatsenabled cheat to set them to both be friends to see if that would help but... still no. Now they both went to college in University together, and when they went to the university campus, the problem seemed to be fixed. Eventually they grew to sorta like each other. I figured the problem was completely solved but when they got back home, the issue came back. I thought maybe the problem was the town at this point, so I had the entire family move out to another town... and low and behold, problem solved.
However, I don't want to have to move them to another town. They have all their jobs, their friends, their families, their everything in the one town. Does anyone know what the problem might be and if there's a way to fix it? I've been unable to find anyone else with this exact issue.