Sim not listening to commands

I've played the sims for a little while now and this is the first time this is happening to me. I have a household with three sims; two adults and one toddler. Before the toddler was born, both sims had no issues. The sim that gave birth still has no problems following commands, but when I try to make my other sim do something (having to do with the toddler or not), they cancel the action. For example, if i order them to put the kid to bed, she just picks him up and places him back down again. This has become an issue especially when the broken sim is the only caregiver around. Even actions like repairing a computer that have nothing to do with the kid get canceled. All day, this sim just stands in one spot looking around unless THEY decide to do something autonomously. I don't understand how to fix this--ive followed every youtube tutorial there is, uninstalled ALL of my mods--pretty much everything recommended to fix this issue. Is anyone else having this problem??