PayPal Retry Payment

Hi,

Using the PayPal Standard plugin Nop version 4.20

When a customer has entered an invalid shipping address and pressed the confirm button on checkout, PayPal's response is "undefined" and it will display return to merchant button to return to the website..

How will a customer edit and correct their shipping address  before they click Retry Payment button?
I tried changing the address in the MyAccounts --> Addresses and if I go back to the order
MyAccounts --> Order, the shipping address still the same.

Yes the order process takes a snapshot of the current (or newly entered) addresses and stores them in the order
Only admin can edit the Order Addresses.
So edit the order address in admin then get the customer to retry the payment