[GRO] Sims freezing when teaching infants to sit

Could you please provide some details what happens ? Do you not have the option ? Do they never learn it ? 

the option comes up but it freezes and empties the cue never practicing sitting

can I uninstall this patch?

HI dee15644​ 

no, patches can't be uninstalled.

Please try the clean folder approach described here: 📓[GUIDE] Clean User Folder Approach | EA Forums - 12690428 

Adult Sim keeps holding infant indefinitely, when directed to practice sitting. If I cancel that action, they autonomously go and put infant down in crib upstairs even if they stand beside playmat downstairs! 

This is happening for me as well.  They just stand there frozen - I have to reset the sim each time.