This just started happening in my game, too. Energy and fun auto-solve stop working, and some Sims in the house seem to be more affected by it than others. I haven't been able to pinpoint or narrow down to a specific object that might be causing it. The energy thing is almost certainly linked to the beds, but the fun I have no idea - removing all computers from my lot fixed it for awhile but it eventually started up again. I've tried removing other high fun advertising items but that didn't help. It seems as though there's some specific item that breaks the fun auto-solve once a Sim has interacted with it, but I can't narrow it down, I have a family of 6 currently and the autonomy is busted for 3 of the Sims in the house, but I would assume that they've all used all the fun objects on the lot at some point or another, so why just those 3 Sims?. I did move the family into a new house and a new lot but like others have said, it fixes the problem only temporarily and then it creeps back in again. .
This has been quite frustrating for sure. I just started playing Sims 4 a couple weeks ago, and played it unpatched for awhile while I got used to the game, so once I did patch and this bug showed up it was really easy for me to tell the difference between the autonomy levels of pre-patch and post-patch. My Sims were far more lively and interesting before, now half of the household stands around unless directed to do something and the other half still has freewill but it seems more limited than it did before - they use the same few items repeatedly and ignore a lot of other stuff in the house that they used to use on their own quite often. I tested other families that I have in the same game and some of them appear to be fine while others are already showing signs of the limited autonomy - doesn't appear to be connected to the size of the lot, either, or I would blame it on large lot lag, but one of the families that is affected is two Sims living in a very small two bedroom starter home, they only have a few Fun items on the lot and they won't even use those most of the time. This particular lot also doesn't have any wall speakers and they've never upgraded anything in the house so I don't think it's connected to that. .
Very disappointing, I truly hope the developers are looking into a solution.
Edited to add - one of the weirdest things about this bug is that when you send the affected Sims to a community lot or another Sim's home, their autonomy works just fine and they move around and fill all their needs like you would expect them to. The bug is only present when they are on their home lot. And it's not tied to one specific lot because half of the families in my neighborhood are having this problem.