Copper Golem Statue does not stack

Description:
The Copper Golem Statue cannot be stacked in the inventory. This behavior is inconsistent with the expected functionality described on the Minecraft Wiki, which states that Copper Golem Statues are stackable (up to 64).

Expected Result:
Copper Golem Statues should stack in the inventory, up to 64 items per slot, similar to other decorative statue items.

Observed Result:
Each Copper Golem Statue occupies its own inventory slot and cannot be stacked with others.

Steps to Reproduce:

1. Obtain multiple Copper Golem Statues.

2. Mine them so they go in the inventory.

3. Attempt to stack them together in a single slot.

4. Notice that they are unstackable.