PO line billed qty not reduced after invoice is cancelled

1. PO created with 2 lines, currently in Approved status.

2. 1st line qty = 5, received = 5.

3. 1st line have 2 receiving, 1st receiving = 3, 2nd receiving = 2.

4. Invoice matched to both of the receiving, total received qty = 5.

5. 1st line billed = 5.

6. User perform invoice cancellation for billed qty = 3.

7. But found the Billed qty in PO line still show 5, instead of 2 (5-3).