Disappearing Item Piles

I smashed a locker, and suddenly it left behind an item pile disguised as empty space(empty space being quite literally, this " "). The item pile appeared again once I dropped an item on top of it. Further testing suggests display racks exhibit the same behavior.

(The magic empty space is right to @'s left to @'s left)

This also happens when something dies on any type of wheel.

SDL and GDI linux builds both have this, if that ‘helps’.