Breaking a block under redstone, door, etc. drops the item as an entity

Breaking a block under redstone, door,sign, etc. drops the item as an entity

What I expected to happen was no item should drop

What actually happened was the (redstone, door, etc.) dropped as an entity when the block below it was broken.

Steps to Reproduce:
1. Place Redstone on a solid block
2. Break the block
3. See the Redstone drop as an entity