Unable to crouch in creative mode

Summary:
Unable to crouch in creative mode.

Steps to Reproduce:
Step 1)Set your gamemode to creative mode.
Step 2) Try to crouch in creative.

Observed Results:
You can't crouch in creative mode.

Expected Results:
You should be able to crouch in creative mode.

Notes:
[This has affected the gameplay and in server like trying build when in crouch mode and other more.]