My Supplier Invoicing Rule is : Based on Incoming Shipments.

I created a Purchase Order for a Stock Item with Qty 10, Price 1400. So Value = 14000. I Confirmed the Order and Approved It.

Now in the Receive Products i put 5 Qty (Partial receiption). I completed the Transfer.

I go to the Incoming Shipments window and can see the 5 received quantity. But here i have 3 issues.

(1) Create Invoice button is not appearing in Incoming shipments window.

(2) From the multi record view of Incoming Shipment i choose this record. Click on More -> Create draft Invoice it gives me error "None of these picking lists require invoicing."

(3) When i simulate this issue on runbot it generates an invoice but not for the partial but for the full PO Quantity (10 here).