Not able to cancel UPI payments Razorpay Flutter - flutter

Question

I'm using razorpay_flutter, to integrate Payments, my problem is, if I select UPI as a payment option, and while the payment is getting processed, if I cancel the payment, it still goes in PaymentSuccessResponse. According to documentation of razorpay, if Payment is cancelled by user means, it should go in PaymentFailureResponse.
Here's my code:
class CheckRazor extends StatefulWidget {
const CheckRazor({Key key}) : super(key: key);
#override
_CheckRazorState createState() => _CheckRazorState();
}
class _CheckRazorState extends State<CheckRazor> {
Razorpay _razorpay = Razorpay();
var options;
Future payData() async {
try {
_razorpay.open(options);
} catch (e) {
print(e);
}
_razorpay.on(Razorpay.EVENT_PAYMENT_SUCCESS, _handlePaymentSuccess);
_razorpay.on(Razorpay.EVENT_PAYMENT_ERROR, _handlePaymentError);
_razorpay.on(Razorpay.EVENT_EXTERNAL_WALLET, _handleExternalWallet);
}
void _handlePaymentSuccess(PaymentSuccessResponse response) async {
print(response);
var message = response.paymentId;
Navigator.pushReplacementNamed(context, Routes.PaymentSuccess,
arguments: widget.details);
_razorpay.clear();
}
void _handlePaymentError(PaymentFailureResponse response) {
var message = response.message;
Map res = json.decode(message);
Map reason = res["error"];
String finalReason = reason["reason"];
if(finalReason == "payment_cancelled") {
Navigator.of(context).pop(context);
_razorpay.clear();
}
else if(finalReason == "payment_failed") {
Navigator.pushReplacementNamed(context, Routes.PaymentFailure,
arguments: response);
_razorpay.clear();
}
}
void _handleExternalWallet(ExternalWalletResponse response) {
_razorpay.clear();
}
#override
void initState() {
super.initState();
options = {
'key':
// "rzp_test_11111111111", // Enter the Live Key ID generated from the Dashboard
"rzp_test_OCp8bDk51p2f96",
'amount': 100,
'name': 'Test',
'currency': "INR",
'description': 'Fees',
'prefill': {
'contact': 8888888888,
'email': test#email.com,
},
'external': {
'wallets': ['paytm']
}
};
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: FutureBuilder(
future: payData(),
builder: (context, snapshot) {
return Container(
child: Center(
child: Text(
"Loading...",
style: TextStyle(
fontSize: 20,
),
),
),
);
}),
);
}
}