"Hive.openBox() "will not be executed down on dingTalk webview(IOS 14.6)

**Steps to Reproduce**
open flutter web url on dingTalk webview( IOS 14.6 ).

When the program is executed to "Hive.openBox()", the program will not be executed down。
"Try catch" does not catch the error,and the code in "finally" will not be executed

**Code sample**
```
static List errorList = [];
static init() async {
errorList.add('13.1');
var path;
errorList.add('13.2');
Hive.init(path) ;
InitUtils.errorList.add('13.3');
try {
errorList.add('13.4 : ${Hive.isBoxOpen(_boxName)}');
if (Hive.isBoxOpen(_boxName) == false) {
_box = await Hive.openBox(_boxName).catchError((error) {
errorList.add('13.5 error：$error');
});
}
} catch (e) {
errorList.add('13.6 error：$e');
} finally {
errorList.add('13.7 finally');
}
errorList.add('13.8');
}

onTap() async {
await init();
/// Loading the page for the first time ： [13.1,13.2,13.3,13.4 : false,]
/// Print after refreshing the page ： [13.1,13.2,13.3,13.4 : false,13.7 finally,13.8]
print(errorList.toString())
}

```

**Version**
- Platform: Web（Flutter Web on IOS 14.6）
- Flutter version: [2.2.0 stable]
- Hive version: [2.0.4]

Start with the reported init() flow and reproduce the hang by opening the Flutter web URL in DingTalk's iOS 14.6 webview, focusing on the await Hive.openBox(_boxName) call. Done means the call completes or reports a catchable failure, with the try/catch/finally sequence behaving as shown by the errorList output.

Written by the indexing model from the issue text.