Re: Sim size upon aging up
@greenean71, this has showed up off and on in The Sims 4 since the beginning. That said it still could be CC related, even if you only have a little bit, or even if your CC is something seemingly unrelated like eye color. ๐คจ You would have to make sure all of your CC is up to date (and that means that the creator is up to date with the game's latest updates!) In the future you would need to move your Mods folder to your desktop, delete the localthumbcache.package file , repair you game through Origin, and then test your game.
However, I have no CC or Mods, and I just had a toddler age up to a child and they aged up at a heavier weight (Even though I aged them after only being a toddler for a few Sim hours since I was testing something and was trying to get them to a teenager quickly.) So even though it is still a good habit to practice what I suggested regarding CC and Mods, I don't think this is caused by CC at this time. ๐
You could try to use the reward potion called "Insta Lean" in the Rewards panel if you have enough rewards points. If you don't have enough for that particular Sim , you might have enough with another Sim and then you can move the potion out of the Sim's inventory into the world or into the other Sim's inventory! ๐
(If you ever get the Cool Kitchen Stuff Pack, there is an icecream maker that can make a flavor of ice cream that causes your Sims to loose weight! :eahigh_file: You only need a bit of cooking skill and the flavor is called "The Taste of Diet". )
I will see if this is a current known bug and get back to you! ๐