Needs don't decay

So I'm playing a legacy sim. Moved her to a new house, then decided for her to have a science baby. She did the whole, leave for the hospital and come back with a baby bit. When she came back with the baby, her needs stopped decaying. I tried exiting out of the game and restarting it, didn't work. I did a game refresh by creating a new The Sims 4 folder and moving my saves back into the new folder, didn't work. I tried moving her and the baby to a new lot, and when I did that, the social and hygeine need started to decay but nothing else. Whenever I have her take a drink to try and decay her bladder need, the green arrows show the need going up even though its already full. I've also tried modify in CAS, as well as disabling and re-enabling need decay several times. I would really like to fix this, otherwise its going to get real boring really fast. Also I'm not playing with any mods, and since I bought the game through Steam I've also tried verifying file integrity.

Having the same problem. I have the bought the bathroom and hygiene perks but that's it. My sim just spent a full day in her art gallery and none of her needs have gone down at all. I tried enabling the needs decay, open/close CAS, go to a different lot, but nothing is working.

So I switched off to a different household for about half a day, and came back to this one and all of a sudden my sims needs are back to normal. Weird, but I'm glad it resolved.

I am having the exact same issue! I have no mods, have tried the same things as you :( 

I'm having this issue but with JUST the bladder need. Both of my sims in the same household bladder need won't decay at all. I think I noticed this after I gave them the steel bladder reward, which says "rarely have to pay attention to their Bladder need". Both my sims should still have gradual decay of their Bladder need, but it has been permanently filled to max since I gave them both this reward.
The weird thing is, they still get the bubble over their head saying they need to go every once in a while and then proceed to go to the bathroom but then the action cancels, I'm assuming, because the need is already full.
I included a screenshot which shows her with the toilet emote, making a tummy ache motion on her belly, and her automatically lining up to go to the closest bathroom. Then as soon as she walks in, she walks out and the action cancels. You can clearly see her bladder need maxed out.
I've already reinstalled the game, and repaired it, and cleared the cache. I will test this out on a new save and my old files as well and update below here.

I have a family of 2. One of the sims often complains that he needs to use the restroom, when his bladder is full/the need is green. 

I'm experiencing this too and I play on Xbox. My sim keeps complaining about needing to go to the toilet but her bladder needs is in the green.

All my fairies keep complaining about needing the bathroom, but anyone who plays with fairies knows they don’t have bathroom needs. Honestly, I am glad others are mentioning this. I have been struggling with it since the update on the 2nd. Thank you! 

I am also experiencing this. It also affects Servos, Fairies and other sims who either don't have a bladder need or have had their need disabled via Steel Bladder or the ghost perk.