Hello there,
Second day on the forums, lets also keep up with the posts. Didn’t found this issue when I searched for it. This is a bug that happens when you have a villager removing or placing a decoration item on a building while a stair is build against it. Sometimes it only shows 2 entires. And as shown in the image belown it also happens 4609 times and my computer goes bad.
Not that hard to reproduce: Just get a building, maybe 2 stories, at some decorations to the colums and let them go wild. They will place the decorations items and then it will occur.
