Unable to crouch underwater/in water

Summary:
Unable to crouch underwater/in water.This occur also in creative/adventure and survival mode.

Steps to Reproduce:
Step 1)Set your gamemode to creative/adventure or survival.
Step 2)Try to crouch in water/underwater.

Observed Results:
As you can see,you can't crouch in water/underwater.

Expected Results:
Player should be able to crouch in water/underwater.

Notes:
(This has affect lot of user out there,like unable to enable shield underwater,building underwater and many more when crouching.This also affect with server gameplay.)