What does the "Utroubled" trait from HSY actually do?

"Untroubled" is a reward trait you get when you complete the Drama Llama aspiration. Unfortunately, its in-game description is very vague.

Untroubled Sims always bounce back. Being a Drama Llama can leave relationships rocky. Nothing says carefree like moving on and letting go.

Does anybody know what this trait actually does?