Sims acting autonomously with hostility disrupting relationship developments

After the 7/23 update. I can't evolve the relationship of sim couples. As happy as they are, they start shouting at each other independently. I did a test with existing sims and also created new sims in cas as a "pair" and, in all cases, this is repeated. But it's not just in couples' relationships, I notice that one sim meets another at random and the symbol of bad reputation often appears above their head.