[CL] [DU] [FR] [ECO] Objects cluttering worlds/Collectibles disappearing

Update 2025/01/30

EA has implemented a non-fix for this. This means that the items are no invisible (most of them) but still there.

The overlapping festivals seem fixed but the objects are not. Same steps apply.

Problem

Objects in worlds start to clutter the world. These are items such as bikes, collectibles, plants, food and drinks. They can't be deleted as they are outside of a lot and even spawn on top of each other.
When loading into R-Rental lots, collectibles or objects left behind disappear.

These objects are left behind by NPCs or active Sims while actively playing either of these lot types

Apartments (San Myshuno, Evergreen Harbor)
Penthouses (Ciudad Enamorada, San Myshuno)
Residential Rentals
Dorms

What happens is that consumable objects/gardening fruits/collectibles/.. get added to the shared space of the affected lots instead of staying in the streets. This prevents the game from cleaning them up and they stay although they sometimes only become visible if you switch back and forth between lots. Some items will stay invisible for ever.

I believe some error happens when you switch back to an affected lot type and then the game doesn't know anymore where the items in the street belong too and attaches them to the shared space of the affected lot type instead of the streets.

Known affected objects

Food/Drink
(Festival) Garden Plants
Flea Market Furniture
Flea Market Collectibles (all of them)
Canvases from Easels in the world
Snow Globes
Bikes
Snowmen & -angles
possibly snow drifts
Pile of leaves
Rainbow Spawner
Boats
Poop
Puddles

Repro Steps

The same can be replicated with snow globe boxes and drinks/food but it's easiest with the flea market

Wait for the flea market to appear.
Travel with any Sim to a not affected lot in the the spice market
Travel to an affected lot (such as an apartment) while the festival is going on in the spice market
Notice that all furniture, collectibles on sales table (and probably picture wall) are gone
Travel back to another lot in the spice market.
Notice the furniture reappear. The collectibles and lamps on the tables won't reappear as the game doesn't know what to do with them.
Wait for the festival to end
Notice how the furniture doesn't despawn when the rest of the festival does.

Solution

There's currently no known solution other than cleaning the neighborhoods up with either mods that give you options to delete objects outside of lots or using S4Studio. Mods are a bit unclear cause the objects become unselectable at some point.

Cleaning up with S4Studio is actually quite easy to do. although it can be very time consuming and slow. You can find detailed instructions here: Objects in neighborhoods are not getting cleaned up. (Method 2) The method is based on what Scorpio1959 posted in the German SimForum

There is no solution on Console other than disabling the pack and saving it without. Depending on how widespread, that might not be an option at all but it may help with the festivals

Cleaning up is a lot of work and the litter just comes back if you switch from any lot to an affected lot within the same hood

Prevent

When living in San Myshuno, don't switch lots during a festival
When living elsewhere, don't travel to an apartment to attend a festival after travelling to non-apartment.
Always wait for the festival to completely despawn before switching lots, leaving the game or going to CAS.
Always close down the game before trying another save.
Collect all the snowglobe boxes before switching to and from an apartment (tedious I know)
Scanning all the hood for possible litter and clean it up before switching to affected lot types (REALLY tedious)