Yes, the no mods game was started on long setting (as it kept settings from my normal game) I created a family with adults, teen, child, & 2 toddlers. After creating them in CAS I went into build mode to renovate a house to fit 7 sims, then went into settings to change to short lifespan. Both toddlers had their birthday on the same day and were the first to age up after playing for the normal number of sim days for short toddler lifestage. The bug only affected one of the 2 toddlers.
@SJWmama Could you try a save without changing the age settings ? I'm guessing that's the cause. you're essentially taking days away if you change from long to short so it's their birthday earlier as anticipated and they just age up.
I had this occur with one of my sims. Life span was short from the beginning of the save (settings changed in previous save files). He was a premade sim, Tomax Colette from RoM. Previous day, he had the "1 day until age up" in the age bar. He woke up at 6am to age up from young adult to adult, followed by a sad moodlet for the missed birthday. Most of the sims I've been playing with seem to be able to get to their birthday cake, but since it happened, I've also been making birthday cakes for a birthday breakfast. XD
