Minecarts are floating when you break the rail below it

The Bug

Minecarts are floating when you break the rail below it

Steps to Reproduce

1. Place down a rail and a minecart on top of it.
2. Destroy the rail and look closely between the minecart and the ground.
3. Take note as to whether or not minecarts slightly float above the ground when not on rails.

Observed Behavior

Minecarts slightly float above the ground when not on rails.

Expected Behavior

Minecarts would not slightly float above the ground when not on rails.