21A? Payables invoice is not following payment terms settings

Content

Our Payables team noticed that some invoices were updating the payment due date after going through workflow approval. Our Invoice Options configuration is set to Net 30 Payment Terms with Invoice Date as the basis. When entering the invoice, the system correctly chooses 30 days from the invoice date. After approval, the due date reflects 30 days from the invoice creation date instead of the due date. Has anyone else seen this occur since the 21A upgrade? 

For a current workaround, we are extending the payments to look further out to avoid missing any due dates. I just want to confirm if this is unique to us, or if this is happening with other customers. I updated the settings today in our production environment, and then saved them again with correct values in place to see if that might make a difference for something being hung up on the back end or something. I'm also attaching screenshots showing the dates for reference. Thanks all!