Production Issue Method: Backflush vs Manual

On SAP Business One, when we create the Production Order and we want to create Issue For Production , but the production order number that we just create is missing, and somehow not showing on the screen or choose from list, Why does this happen?? Issue Method on Production: Backflush or Manual We must change the Issue method from Backflush to the manual. Because the backflush method will automatically issue the item for us, so we can’t issue the production manually and the order won’t show on issue production menu. That issue method on all row details are based on