Player crouching while falling causes jittery paperdoll animation

Summary:
When a player in crouching state and then fall into the void cause the paperdoll animation to be jittery.

Steps to Reproduce:
Step 1)Make sure the you are on crouching state.
Step 2)Then fall into the void in crouching state.

Observed Results:
When a player fall into the void in crouching state cause the paperdoll animation to be jittery.

Expected Results:
When a player fall into the void in crouching state it should not cause the paperdoll animation to be jittery instead.It should only show the player is in the state of crouching when falling into void at the paperdoll animation.

Notes:
Additional Information,it could also occur anywhere when you in state of crouching and then fall from a high place or elsewhere.