We are facing an issue with IPN. We are not receiving payment status immediately after payment is successful. It is taking above minute sometime. We are unable to update user accounts automatically if the payment confirmation from PayPal via IPN is delayed. We are having a large number of complaints from our customers and we are losing some as a result. We are very much dependent on IPN for sending transaction on tracking plateforms (this code is on our return page). Please suggest the solution for this.