webview_flutter doesn't recognize taps on iOS

I have integrated the WebView widget from webview_flutter into my flutter application. The problem I am facing is that WebView works perfectly on Android, but on iOS WebView doesn't recognize button taps.

Widget build(BuildContext context) {
    var mediaQuery = MediaQuery.of(context);
    return SingleChildScrollView(
      child: SizedBox(
        height: mediaQuery.size.height - 60 - mediaQuery.padding.top,
        child: WebView(
          initialUrl: widget.url,
          javascriptMode: JavascriptMode.unrestricted,
          javascriptChannels: {
            _extractDataJSChannel(context),
          },
          onWebViewCreated: (WebViewController webViewController) {
            _controller = webViewController;
          },
          onPageFinished: (_) async {
            // TODO
          },
        ),
      ),
    );
  }

I am using flutter 1.27.0-8.0.pre and webview_flutter: ^1.0.7. I have also tried to use the latest package version and 2.2.3 version of flutter and the issue persists. Any feedback is highly appreciated!