I found the Issue.
I have used the ORDER MODIFIER - ASK FOR PORTION Order Tags & Portion Popup Ask Question
Because of which i had changed UPDATE ORDER ACTION
From [:Decerase] to [:Decrease Inventory]
This was causing the issue for Voiding and Inventory.
I have changed back it to [:Decrease]
Can you check this link and see if it right way to use that tutorial nd if it is working right.