We currently have a bug affecting the ReturnTo address. If the ReturnTo address has been added in Consignor On-premises on a specific product and you change from this product to another product, the ReturnTo address will be included on the new product. The bug only appears when changing products in Production and going from a product with a ReturnTo address to a product with no ReturnTo address specified.
The bug has been reported to our developers. Please click the Follow button to be notified when this has been resolved.
Update 27-11-2018: This has been resolved and released on all platforms