Custom PO PDF template is not being applied despite configuring the procurement business function

Summary:

One of our client's requirements is to utilize a custom PO PDF template, which has been created and is located in the Shared/Custom/procurement/Purchasing path. This template has been selected under document types for purchase orders in the configure procurement business function task. We have also created new purchase orders in the system.

However, the PO PDF document is still using the standard template instead of the custom one for newly created purchase orders in Open status. Please advise on how to resolve and remediate this issue as this is a critical requirement for our client

Version (include the version you are using, if applicable):