Purchasing: Unable to Cancel Approved Purchase Order lines 12.1.3 [POST UPGRADE]

Hi All,

We are upgrading from 12.1.2 to 12.1.3 and there are numerous road blocks.

The one we have stumbled upon recently is that,

We have created a PO in 12.1.3. Approved It.

Queried the PO from the 'PO Summary Form' Tools > Control > Cancel PO Line (clicks OK in the Warning)

There is no change visible. The PO line is intact.

The same PO line could be cancelled from the 'Purchase Order' form.

A similar PO created in 12.1.2 could be cancelled from the Purchase Order Summary form without any issues.

Inputs please!

Kind regards,

Arun