As sale does not know about special lines it will always update the price based on product and price list instead of applying the correct shipping rate, so we do skip those lines by using a newly introduced hook method closes odoo/odoo#110782 X-original-commit: f1265b7fdce6bbe3fea97fc4b275dc2dca18103d Signed-off-by: Arnold Moyaux (arm) <arm@odoo.com>