Order duplicate verification is NOT made when saving PO line

Overview:

An Alert notifying Possible duplicate order line is not displayed when saving equal PO Line 

Preconditions:

1.0. User with permission to create/view/edit Orders and Order Lines is logged in
2.0. Organization-Vendor exists with the following configuration:
2.1. Organization status: "Active"
2.2. Account 1: "valid data"
2.3. Account 1 Status: "Active"
2.4. Payment method: "EFT"

3.0. An Order exists with the following configuration:
3.1. Vendor name: "valid data"
3.2. Order Type: "One-time"
3.3. Manual option: disabled
3.4. Workflow status: "Pending"
3.5. Added POL#1 Title name: any available from drop-down menu
3.6. Added POL#1 acquisition method: "Purchase"
3.7. Added POL#1 Product ID: has a valid ISBN brought from inventory instance
4.0. Second PO has been created
4.1. User has started adding a POL to that PO

Steps to Reproduce:

1. Select the same title that was selected from inventory in the existing order (Navigate Title look-up>Search & filter>Instance>Effective location>Main Library>Select item

2. Fill in all the remaining required fields with valid data

3. Click "Save & close"

4. Click "Confirm" button

Expected Results:

When saving created PO Line a "Possible duplicate order line" Alert is displayed

Actual Results:

No Alert after clicking "Save and close"

Additional Information:
URL:
Interested parties: