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 ...
Ideas
I´ve been having this issue and now the bikes and coffee cups aren´t clearing up or going back in to the sims inventorys. I can go home or lots without travelling now.
This bug occurs whenever you play an apartment, a dorm and/or residential rental. For some reason stuff from outside the lots is assigned to the ZoneObjectData. You can check this with S4S and you will see that also spawners for rocks, fruits, etc can be found multiple times in those ZoneObjectData. This happens each time you enter such a lot. In one case the ZoneObjectData for a certain lot got bloated from 0.5 MB to 7 MB just in one sim week. The picture shows 8(!) bicycles stuck over each other.