Items in the StorageBox multiply

[Minor2CCh]

storagebox-1.4.2-1.21.jar
In the above version,
when you have two StorageBoxes,
put the item you want to increase into StorageBox-A, then move it to another slot without closing the inventory.
Move StorageBox-B to the slot where StorageBox-A was.
After that, remove the item from the StorageBox slot and place it back in the same place.
The contents of StorageBox-B will then change from empty to the same contents as StorageBox-A.
When you remove items from both StorageBoxes, you will have twice the amount of items originally put into StorageBox-A.
minecraft version: 1.21.1
fabric version: 0.16.9
fabric API version: 0.110.0