[ARCHIVED] Moveobjects (Moo) Causing items to disappear

I'm having this same problem. (No mods/CC since before the big July update and installing CoL All the DLC except Batuu and the kits. Game version 1.77.146.1030.)

I built a farmhouse from one of my families and used MOO in a few places, but sparingly - added two counters rotated 45° to fill the gaps on the sides of a diagonal stove, added a soap dispenser next to the bathroom sink, moved a plant closer to a corner kitchen counter with a bunch of clutter on it, overlapped some ivy (or some other green climbing plant) on an outside wall, and put a couple of debug flowers on the ground inside my animal enclosure overlapping the cow shed footprint.

At some point while playing, I noticed that the bathroom sink had disappeared and later found it in the household inventory. Sometime after that, I saw that the cluttered corner counter, along with everything on it, had been moved to the household inventory. I put these back and so far they have stayed where they are, even after travelling to different neighbourhoods and playing for about a Sim-week. (I haven't played any other households though.)

The flowers in the animal pen and greenery on the wall seem to be gone forever, though, I assume because they were debug items. I haven't put those back yet because I'm not sure what caused the initial disappearances (if it was travelling, building, quitting and reloading the game, or something else) and don't want to deal with the debug menu until I know they'll stay in place.

Edit: The angled kitchen counters beside the stove have not been affected for whatever reason.