Item Tax category not defaulting in PO Localized form

Hi

I have an issue on Item Tax category not defaulting in PO Localized form. Pls find below the steps to reproduce the issue in 12.1.3 version

1. Create purchase requisition with out supplier and approve it

2. Create Standard Purchase through Auto Create option using the PR

3. Do not mention supplier & site in the auto create window

4. SPO standard form opens without supplier and site. Enter supplier and site and save the record.

5. Now close the standard form and query the same SPO in PO localized form

6. Item tax category is not defaulted from supplier additional info

7. If i create a manual  SPO, item tax category is defaulting