not a bug, roblox is making up for space to make a cube that the csg fits in,
so lets say we have 2 cubes side by side at the same height and place 3 cubes on of these cubes and union all of it. there would now be 4 cubes in one stack and 1 in the other, if you tried to walk on the single cube you would be at the height of 4 cubes. |