Having a toddler in my actual game I also can confirm now that the bug has gone or does at least not occur every time like in the past.
There is now a glitch where all, and I mean all of the female children in the game are heavier than they should be. And I am not being inconsiderate of other people's weight and feelings. Because in every Sims 4 Lets Plays that I watch regularly, every single female baby has aged up to be a heavier child. (including my own sims in several different saves) This happens even if the parents are very thin too. I just thought I would share this issue.
I'm having the same issue after the last update but not with just female children.
All new women Sims in my game are being born with big feets and belly even if she is thin. It's so big that I have to turn on the CASfulledit to reduce the sizes.
