3735471 - PO Approval Comments disappears once the approval completed

On S/4HANA Cloud system, comments added during the PO approval process in My Inbox are visible during the workflow but disappear once the approval is completed.

It works as expected.
Comments are stored in workflow work items, not in the PO document itself.
When workflow completes, work items are closed and comments become inaccessible through standard PO apps.

KBA , BC-BMT-WFM , Business Workflow , Problem