I recently noticed while using a dragon head and a Piglin head on the latest preview version that when activated by redstone to move, the heads in the inventory move as well.

Steps to Reproduce:

1. Create a new world in creative mode.
2. Get a dragon head/Piglin head, redstone and a redstone torch/redstone block from the inventory.
3. Activate the head with redstone to make it move.
4. Watch the one from your inventory.

Observed Results:
The head in the inventory moves with the one you have placed.

Expected Results:
The head in the inventory doesn't move with the one you have placed since they are two separate heads.