[GRO] infant won't reach milestones

By now the infant sim performs the action 'said first word' on its own, but still no milestone

Did you test this on a new save game that never had mods on a clean folder ?

crinrict yes, a fresh new game without mods after the latest update.

The only 'special' thing I might have done was to turn aging on in the game settings.

I don't know how to fix it. I've restarted the game at least 5 times now, and I turned aging back off.

I'm seeing the pull to stand interaction appear when my infant sim is asleep, but disappearing again.

She also tries to unlock the crawling milestone, the infant will 'flash' as if she reaches a milestone, the crawling action pops up in the queue, but cancels itself again and no milestone is achieved.

By now I also have the problem that I can't pick up the infant sim anymore, the same issue that others describe for small dogs and cats. 

https://forums.ea.com/idea/the-sims-4-bug-reports-en/cd-sims-dont-do-feel-the-love-hug-or-kiss-animation-with-catssmall-dogs/13401185

I have two infants and the one infant none of the motor milestones are giving credit. The other milestones are showing up and on the other infant they are working although I had to get them through tummy time. Parent couldn't teach sitting as it would freeze and leave the cue.