iSupplier- Request Changes tab doesn't have SUBMIT button to make changes on quantity

12.1.3

Navigate to iSupplier Portal Full Access using supplier login

Search for PO in Open status and not closed status

Select one of the PO and click the Request Changes button

Go to the line and modify one of the line's qty and select the reason as Change.

Now there is no SUBMIT button to send these changes back to the buyer.

I could see cancel, approved, reject buttons.

Went to the personalize page and rendered is equal to True for this Submit record.

Any reason why this is not visible