Kruckel review for Amazon MCF by WebBee

I use this app to link the products I am selling in Amazon and Shopify, and then fulfill the orders in Shopify with Amazon FBA. In Amazon, one ASIN may have several SKU names due to different barcode for the same product, such as Amazon barcode, Amazon FNSKU barcode, and manufacturer barcode, etc. This app link to Amazon SKU only instead of ASIN, so if a SKU does not have inventory, but another SKUs have inventory, in Amazon, the customers still seek that the product is available for purchasing. However, in this app, if the product listing is linked to the SKU without any stock, the customer cannot buy in Shopify. This bug needs to be fixed.