useOnDownloadStart not working on release build

[arashAndroid]

Environment

**Flutter version:Flutter 1.12.13+hotfix.5 • channel stable
**Plugin version:Using latest master (git)
**Android version:8

**Device information:LG H990

Description

Expected behavior: Download File in release build

Current behavior: Not downloading file on release mode, only working in debug build

Steps to reproduce

I am Using this code to run InAppWebView:

return isLoaded
        ? Scaffold(
            appBar: AppBar(
              title: Text(appTitle),
              backgroundColor: colorAccent,
            ),
            body: InAppWebView(
              initialUrl: link,
              initialHeaders: {},
              initialOptions: InAppWebViewWidgetOptions(
                crossPlatform: InAppWebViewOptions(
                  debuggingEnabled: true,
                  useOnDownloadStart: true,
                ),
              ),
              onDownloadStart: (controller, dUrl) {
                print('downloading | link = $dUrl');
                _launchUrl(dUrl);
              },
              onWebViewCreated: (InAppWebViewController controller) {},
              onLoadStart: (InAppWebViewController controller, String url) {},
              onLoadStop:
                  (InAppWebViewController controller, String url) async {},
            ),
          )
        : Scaffold(
            appBar: AppBar(
              title: Text(appTitle),
              backgroundColor: colorAccent,
            ),
            body: Center(
              child: CircularProgressIndicator(),
            ),
          );

2. There is a file in the link that I can click and download a file. This code works on debug build but in release build nothing happens and no error is shown.

Tried it without the debuggingEnabled: true, did not work.

[pichillilorenzo]

Fixed from release 3.0.0+.

[github-actions]

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