This bug first appeared in the last snapshot 24w40A of version 1.21.2.

Content: When players use a stone cutter to divide any stone block, such as a stone brick, they can place it in the middle of the left slot of the stone cutter interface to display selectable blocks (stairs, fences, steps, and other variants). On the right slot, they can retrieve the desired item.

bug: Before retrieving an item, try double clicking on the square in the middle large box. The divided square on the right will disappear, and the name will not be displayed when the mouse hovers over it. Clicking on the slot on the right will mysteriously reveal the item. Explanation: When placing the desired block for the first time and only clicking on the item in the large box, the square in the output slot on the right will not disappear. This issue has not been fixed in the latest version of snapshot 24W45a