[LS] Sim who has never been heartbroken died of broken heart

My sim is dying of a broken heart when they shouldn't.  I am doing serial romantic aspiration.  I am doing you can call reserve 100 baby or knock up the townies.  My sim has the uncommited trait.   The romantic boundaries are set to no jealousy.   I had this problem since lovestruck.  New game play is with a fairy sim.   My sim goes on a blind date and dies after woohoo or at end of date.  Game should either have a toggle or smart enough to know with either the uncommitted trait, serial romantic aspiration or jealousy selections in create a sim that they can't die of a broken heart. 

I'm having this problem too! I have a sim who is dating/woo-hooing around and while romancing someone she gets a notification that says "Nadya is feeling the negative effects of love and is truly suffering. Something is approaching..." despite not having any negative romantic interactions. After the notification she also gets a sad moodlet that says "Sorrow (From Broken Heart)". Luckily I have UI Cheats so I just cheat the moodlet away and she hasn't died but I know not everyone uses mods!

EDIT: Just wanted to add that this sim also has all of her jealousy triggers set to "no" so I wonder if that's related?