Voucher Pay Terms Basis Type Changes When Copying PO

We recently upgraded from 9.2 Image 11 to 9.2 Image 23 and found something has changed when copying a PO into a voucher. On Image 11 when a PO was copied into a voucher the Pay Terms Basis Type remained as the Invoice Date we have configured as the default in payables. However, on Image 23 when a PO is copied into a voucher the Pay Terms Basis Type changes from Invoice Date to Accounting Date, which is calculating the Scheduled Due Date by the Accounting Date - We need it to remain as the Invoice Date.

We found on the Purchasing Options page the Pay Terms Basis Type is selected as Accounting Date, but this set up was the same prior to our upgrade when we were on Image 11. Is this working as designed? Did something change from Image 11 to Image 23 to require the Pay Terms Basis Type to change based on what is on the Purchasing Options page when a PO is copied into a voucher? Or was this an existing issue in Image 11 we were unaware of?