Played a bit more and here's a major thing I noticed:
Once mine learned how to sit up, the parents need to check on the infant decreased significantly. I had twins, so I noticed this because one learnt how to sit and after that the parents only kept constantly checking the one who didn't sit. For the one who knew how to sit they only checked needs maybe once or twice a day, whereas with the other one they kept checking all the time.
@Bnibuilds Hmm... so maybe in a way it's partly fixed by buying the pack? Because without the pack they never "learn" to sit up, they just can from the beginning. And parents are constantly queuing "check infant" which just turns into either "cuddle" or "put down" no matter what they need.
But if they've put in extra coding to make sure the infants are taken care of while they can't move in Growing Together (maybe overdone it), and then in base game the milestone never happens to trigger turning it off... and then maybe since it's not properly turned off it's still affecting even toddlers...
