WebViewState finishLoad calling multiple time

Based on finish load I want to save this url in database. But finishLoad calling multiple time. Why it's behavior is like this?

my code:

_webviewPlugin.onStateChanged.listen((WebViewStateChanged state) async {
if (mounted) {

if(WebViewState.startLoad == state.type){

setState(() {
isProgress = true;
});

}else if(WebViewState.finishLoad == state.type){
isProgress = false;
await database.saveUser(new History(widget.uri.toString(), "Hello title"));

}
}
});

Start at the _webviewPlugin.onStateChanged listener and the WebViewState.finishLoad event path shown in the report. Reproduce the repeated finishLoad notifications with the provided database save, then document the event lifecycle and the condition under which the URL should be saved.

索引モデルが issue の本文から書いたものです。