Was that order fulfilled by Amazon? I have a suspicion that some of the "counterfeiting" is done by substitution of inventory by a bad actor, and FBA silently

Was that order fulfilled by Amazon? I have a suspicion that some of the "counterfeiting" is done by substitution of inventory by a bad actor, and FBA silently ignoring that. VendorA sells a good product with decent margin using FBA as their fulfillment mechanism. VendorFakeA claims to sell same product with discount and sends seemingly valid inventory to FBA - which co-mingles the inventory and throws away the receipts. Customer buys something from VendorA but gets VendorFakeA product instead. It's like a supply-chain joe-job but VendorFakeA profits.