not getting a specific data from getCookies();

I am trying to access data from web cookies as
```
_onUrlChanged = flutterWebviewPlugin.onUrlChanged.listen((String url) async {
if (url.contains('response.php')) {
flutterWebviewPlugin.getCookies().then((cookies) {
print(cookies);
print(cookies['STATUS']);
flutterWebviewPlugin.close();
});
}
});
```
and the output of this is
```
I/flutter (12342): {"TXNAMOUNT: 549.00, CURRENCY: INR, STATUS: TXN_SUCCESS, ORDERID: sfsdfgfgfcvcfghdfgfg, TXNDATE: 2021-07-08+14%3A31%3A26.0"}
I/flutter (12342): null
```

when I simple call cookies then it print all correct but when I trying to get special key from it then it shows null and when I use to call ``` cookies.keys() ``` then ``` first one has " ``` and last value has "