Sulfur cubes with blocks inside them produce footstep sounds when moving across the ground

The Bug:

Sulfur cubes with blocks inside them produce footstep sounds when moving across the ground.

This could be intentionally, but it struck me as quite odd.

Steps to Reproduce:

1. Summon a sulfur cube and place any block in it.

2. Push it along the ground and listen closely as it moves.

Observed Behavior:

Sulfur cubes with blocks inside them produce footstep sounds when moving across the ground.

Expected Behavior:

Sulfur cubes with blocks inside them would not produce footstep sounds when moving across the ground.