Sims/Pets age up multiple times in a row

The same thing happened yesterday with their second child. He aged from toddler to child, then instantly aged from child to teen. Again, I exited the game without saving, and when the second child aged up from toddler to child again, the glitch did not happen again.

I just started, so this is with a very vanilla setup with nothing beyond the basic game.

• Same bug just happened to me for the first time.
• I had a toddler (2nd child), he was born, not created from CAS. 
  He went to age up autonomously, walked to a random picked location and aged to child, then immediately to teen and again immediately to young adult then stopped.
  For each aging I got the usual pop up asking to pick a trait and went back to gameplay to immediately have him age up again.
  I aged him up from baby to infant ahead of time myself.
  I think he aged up from infant to toddler autonomously a bit ahead of time as well. Not 100% sure.
• I just got several packs as of today when this bug happened: For Rent, Lovestruck, Life and Death, Bust the Dust, Paranormal, Strangerville, Crystal Creations, Jungle Adventure.
• Playing on PC (windows).
• No CC or mods installed, playing with normal aging.
• I'll update with more details if it happens again on that sim on other sims.

My sim infant aged up to a child without becoming a toddler first i got the pop up to choose the toddler trait but immediately i got to choose the child trait and my infant become a child.

After the latest update fixed the trashcans.

My sim aged up from an infant to a toddler to a child to a teen and I paused the game cause I don't want her to die. I don't know what to do.

Same, my sim aged from infant to toddler, and then immediately to child

Yep I've tried restating the game several times. My sim auto ages from infant to toddler, then toddler to child, then child to young adult, then young adult to adult, then adult to elder, and all I can do is select traits. I don't know how to make this stop but it's very frustrating. I've tried repairing the game and I'm going to try uninstalling and reinstalling it.  

Some sims tend to double age aka skip one age stage when aging up. My sim was an infant and aged up straight to be a kid. I reversed this in CAS so the sim was a toddler now. He ended up getting school homework in his inventory, but I didn't think too much about it.

Then, my sim aged up to a kid. He started school with the grade of F (in Finnish version grade 4, so I think grade F is the right translation here?). So the game logic seems to think that the sim has been skipping school while he was still a toddler.

When its a infants birth day they age up but dont stop they age up  again and age up again and age up again until they turn into an teen or young adult sometimes even an elder! I have restarted and Repaired and Cleared Cash