The motion of primed TNT is choppy and jittery

The Bug:

The motion of primed TNT is choppy and jittery.

Steps to Reproduce:

1. Place down a TNT block high above the ground.
2. Ignite it and watch it closely as it falls.

Observed Behavior:

The motion of primed TNT is choppy and jittery.

Expected Behavior:

The motion of primed TNT would not be choppy and jittery.