I would hold a meeting regarding the situation with all vendors and project departments involve and devise a plan to resolve as quick as it can. The first plan would be testing each part of the product in order to determine what is the cause of the defect and making sure that during inspection process nothing has defected the product. Once the source is detected, find a way to fix the product for example, going back to the manufacture company making sure that the package is being done properly without anything that can influence the defect or change inspection process. This will reduce the amount of time but however if it doesn’t fix the problem, there has to be a change in the product.