Flutter Web: Sentry Feedback submission fails focus_manager assertion

[iveloff-developer]

Flutter Web app. Don't know how to fix that issue and don't understand why it occurred.

Pre-conditions: set up feedback_sentry following Getting Started.

Steps to reproduce:

1. copy code example and provide <your_dsn> for Sentry.
2. tap on button that calls BetterFeedback.of(context).showAndUploadToSentry();
3. submit feedback in feedback ui (feedback ui disappears after submission and come back to app ui itself)
4. tap anywhere on your screen (maybe few times)
5. exception caught by Flutter Framework - screenshot at the bottom

Code example:

import 'package:feedback_sentry/feedback_sentry.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:sentry_flutter/sentry_flutter.dart';
import 'package:sentry_logging/sentry_logging.dart';

Future<void> main() async {
  await SentryFlutter.init(
    (final options) {
      options
        ..dsn = '<your_dsn>'
        ..tracesSampleRate = 1
        ..addIntegration(LoggingIntegration());
    },
    appRunner: () {
      // Errors sent by Flutter.
      FlutterError.onError = (final details) async {
        await Sentry.captureException(
          details.exception,
          stackTrace: details.stack,
        );

        FlutterError.presentError(details);
      };

      // Errors sent by the platform.
      PlatformDispatcher.instance.onError = (final error, final stack) {
        Sentry.captureException(error, stackTrace: stack);

        FlutterError.presentError(
          FlutterErrorDetails(exception: error, stack: stack),
        );

        return false;
      };

      final app = DefaultAssetBundle(
        bundle: SentryAssetBundle(),
        child: const BetterFeedback(child: SentryWidget(child: App())),
      );

      runApp(app);
    },
  );
}

class App extends StatefulWidget {
  const App({super.key});

  @override
  State<App> createState() => _AppState();
}

class _AppState extends State<App> {
  @override
  Widget build(final BuildContext context) => MaterialApp(
    home: Scaffold(
      appBar: AppBar(title: const Text('Sentry Flutter Example')),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          BetterFeedback.of(context).showAndUploadToSentry();
        },
        child: const Icon(Icons.bug_report),
      ),
    ),
  );
}

[ueman]

Which Flutter version do you use?

[iveloff-developer]

flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.29.0, on macOS 15.2 24C101 darwin-arm64, locale en-US)
[✓] Chrome - develop for the web
[✓] VS Code (version 1.97.2)
[✓] Network resources