Named sulfur cubes can despawn after being picked up with a bucket and replaced

Named Sulfur Cubes can despawn after being picked up with a bucket and placed again. This does not occur if the named Cube has never been bucketed or if it has an absorbed block.

Steps to Reproduce:

1. Summon three Sulfur Cubes separated by fences.

2. Name all Cubes with Name Tags.

3. Make one Cube absorb a block.

4. Bucket the Cube with an absorbed block and one normal Cube.

5. Place both Cubes back into the world.

6. Move more than 128 blocks away.

7. Return and observe the normal bucketed Cube has despawned.

Expected Result:
Named Sulfur Cubes should not despawn.

Actual Result:
Named Sulfur Cubes that were bucketed and do not have an absorbed block can despawn.