We have encountered many issues and customer frustration with the payment link not reflecting the correct amount shown on the invoice. As an example, customers quote is ready for approval, so it goes into approval status, this automates a trigger for an email and the payment link to display. The customer now wants to change quantities and with this change, it changes the costs. We resend the quote and it still reflects the previous balance. This requires the sales department to manually update the payment button each time there is a change which can easily be overlooked.