[GRO] Milestones stop accomplishing when leaving lot

Try the following

• Close the game
• Rename Documents\Electronic Arts\The Sims 4 to Documents\Electronic Arts\The Sims 4_Old
• Repair the game
• Start the game. All your content will be gone now as the game created a new folder. All your saves/.. is still in the old folder so not to worry. 
• Start a new save game
• Check if you still have the error
• Report back with your results for further steps on how to get your stuff back.

I did this and the problem has persisted.

To be sure, you have the same issue with different Sim in a new save ?

Yes. I've deleted all save files. It happens with every new save and new sim that I use.

Strange that there haven't been any other reports for this.

Do you need help getting your stuff back ? Although if you deleted instead of moved as instructed, they  are not recoverable unless they are still in your trash.

No I don’t need help getting my saves back. I had already troubleshooted as instructed before coming to the forum for help and I didn’t want to keep my saves at that point. 

It only happened once as far as I could tell, since I stopped counting the fact that even after the graduation ceremony my sims don't have that milestone. It was a child sim. He learnt how to ride a bike twice without the milestone activating, the third time even the learning choice was gone, he could only ride the bike, which is not surprising if you take into consideration that he had already mastered that skill twice. I just aged him up without that particular milestone. Felt bad though, as if he had missed on an important life experience.

After seeing this it seems like this might be the cause of my infant not getting her milestones? I don't know if it's impacting other sims in the household, as obviously it's far more obvious with infants than older sims. Moving her out and back in temporarily fixes her, but as soon as I leave the lot with anyone, it comes back.