Levers use wood sounds rather than stone

Despite having a solid cobblestone base, levers use wood for their placement, breaking and co. sounds, which does not seem right. Shouldn't they be using stone's sounds instead?

Steps to Reproduce:

• Place down a lever.
• →  Notice how the lever produces a wood sound upon being placed.
• Break the lever.
• →  Notice how the lever produces a wood sound upon being destroyed.

Expected Behavior:

The expected behavior would be that levers would produce stone sounds as they are mostly constructed and crafted with stone.