Summary of Bug: mine duplicated itself in scene sandbox. I only have three buildings in there, one being a mine, but there are two mines in the scene!

no screenshots for this, but also, I tried to fill slot four with a different building, and that resolved the error, but when I emptied slot four, the place I'd moved slot four's item to became the mine double. there are no other items in the scene. also, I tried replacing the mine with a different building, and the clone became the new building, every time.
also, even when slot four is empty, I can move the shapeshifting clone mine around if movement is clicked. so for now it's banished outside of the scene lol

oh, and the error persists when click preview.

edit: also, when I added some decor items to the scene, they could not be moved

Steps to Reproduce: I reloaded the page, tried again, and the glitched mine returned... so probably just loading up my scene loadout.

Browser/OS/Device (only if layout or image related): chromebook, google chrome

Screenshot:

this happens when a slot above a building/decor is empty, for now until it gets fixed make sure there arent any empty slots above decor or buildings

@jellyjam thanks