If a chest is duplicated and lined up, a bug occurs when opening that chest.

The bug occurs when a chest is duplicated using a key input, and the duplicated chest is placed next to another chest.
Below are the results of my experiments:

1. When a duplicated chest is placed next to an empty chest, opening the duplicated chest causes the empty chest to play its opening animation. However, the animation when opening the empty chest itself is normal.

2. If two duplicated chests are placed side by side and one of them is opened, the unopened chest plays its opening animation. Then, when trying to open the previously unopened chest, it will play its own opening animation.

3. As an exception to case 2, if the same operation is repeated at the same x,z coordinates, an unexpected chest may open.

4. These chests do not function as normal chests, and their contents cannot be removed. Additionally, if an item is placed inside and the chest is opened again, the item will disappear visually, and it will be transferred to the chest that plays the animation. See video 2 below for more details.