Sims lagging? A bug? Or is it me? 😅

alyssablngr​  For the lag, please provide a dxdiag.  Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop.  From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.

The issues with the nanny may also be lag-related.

For the water issue, is this lot partially in the water?  Is there a pool on the lot, and if so, does deleting it help?  You don't need to save your progress.

I would also like to know how much of the lag goes away if you age up the infant to a toddler.  You don't need to save your progress here either; it's just a test.

puzzlezaddict​ Thanks so much for the assist! Here's the requested dxdiag. The lot is partially in water with a small pond, and there is a small pool on the lot as well. I will try the troubleshooting now with the water & infants and keep you posted/update this reply. 

Update on aging up infants to toddlers- it took me a while to age him up, and my Sim was unable to help him blow out the candles. She glitched out and froze everytime I tried. The butler, however, was able to age him up. Once the infant aged up to a toddler, everything was a bit better! Still a bit of a lag, but nowhere near as bad as the infants. The sims at the very least don’t freeze/glitch out anymore, but just take a bit longer to register/complete tasks. The lag now is more with switching sims than anything else. Aging up the toddlers also seemed to help with the lag when pausing/playing. Checking on water now!

Update on water- deleting the water from the lot did seem to solve the issue of the option for Tummy Time and other infant activities being greyed out. I did also want to mention that the water glitch was not consistently happening, so in many cases I was able to make them fly somewhere instantly, travel back, and try again and it generally worked. But, it’s nice to know deleting all water from the lot helps!