Done shipment with shipment cost on shipment is duplicated when duplicating an invoice on Tryton 7.0
We noticed a strange behavior on Tryton 7.0 (not able to reproduce on 7.2).
With sale_shipment_cost module activated, we create a sale (shipment on order, invoice on shipment, shipment cost on shipment). We process the sale. We process the shipment (we set a shipment cost (cost, cost sale)) and do the shipment. So we have an invoice with shipment cost. We post the invoice and then we duplicate the invoice. Invoice is duplicated but also the shipment ???