Bug after paiement with CIC (notification url add shipping cost)

Hi, Bug after payment: addition of shipping costs at the time of the notification url from the bank to the site. I use Prestashop 1.6. It works well with BNP Mercanet and paypal. Shipping costs are offered from a certain amount (these costs vary depending on the country). If the amount of the basket is less than the carriage paid, then everything works. If the amount is higher then the shipping costs are free. The basket is correct, we chose the bank. The amount displayed on the bank's website (test mode) is correct. We pay, everything is correct. Then we come back to the site and the order goes into error because the amount received is different from the (new) amount present in the order indeed, shipping costs have been added. The management of shipping costs is used by the module "free management fdp" and everything works well with paypal and BNP. Thank you for your price proposal. More information and screenshot in MP. Best regards.