example

main.dart

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/widgets.dart';
import 'package:flutter/material.dart';
import 'dart:async';

//void main() => runApp(const Center(child: const Text('Hello, world!', textDirection: TextDirection.ltr)));

void main() {
  runApp(new MaterialApp(home: new EditProfileInformation()));
}

class EditProfileInformation extends StatefulWidget {
  @override
  EditProfileInformationState createState() {
    return new EditProfileInformationState();
  }
}

class EditProfileInformationState extends State<EditProfileInformation> {
  Stream<int> dbCall;
  final StreamController _controller = new StreamController<int>();
  final myController = TextEditingController();

  @override
  void initState() {
    super.initState();
    dbCall = _controller.stream;
    myController.addListener(_printLatestValue);
    new Future<void>.delayed(const Duration(seconds: 1)).then((_) {
      _controller.add(1);
    });
  }

  void _printLatestValue() {
    print("Second text field: ${myController.text}");
  }

  @override
  void dispose() {
    myController.removeListener(_printLatestValue);
    myController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: new AppBar(
        title: const Text(
          'Edit profile',
        ),
      ),
      body: new StreamBuilder<int>(
          stream: dbCall,
          builder: (BuildContext context, AsyncSnapshot<int> snapshot) {
            if (snapshot.connectionState == ConnectionState.active) {
              return new Container(
                child: new Column(
                  children: <Widget>[
                    Padding(
                      padding: const EdgeInsets.all(8.0),
                      child: TextField(
                        controller: myController,
                      ),
                    ),
                    new Text(snapshot.data.toString()),
                  ],
                ),
              );
            } else if (snapshot.connectionState == ConnectionState.waiting) {
              return const Center(child: const CircularProgressIndicator());
            } else {
              return Center(
                child: Row(
                  crossAxisAlignment: CrossAxisAlignment.center,
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: const <Widget>[
                    Padding(
                      padding: const EdgeInsets.all(8.0),
                      child: const Icon(Icons.error),
                    ),
                    Text('Error loading data')
                  ],
                ),
              );
            }
          }),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
            _controller.add(1);
        },
        child: const Icon(Icons.done),
      ),
    );
  }
}

import 'package:flutter/widgets.dart';
import 'package:flutter/material.dart';
import 'dart:async';

//void main() => runApp(const Center(child: const Text('Hello, world!', textDirection: TextDirection.ltr)));

void main() {
  runApp(new MaterialApp(home: new Home()));
}

class Home extends StatefulWidget {
  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(),
      floatingActionButton: FloatingActionButton(onPressed: () {
        Navigator.push(
          context,
          MaterialPageRoute(builder: (context) => EditProfileInformation()),
        );
      }),
    );
  }
}

class EditProfileInformation extends StatefulWidget {
  @override
  EditProfileInformationState createState() {
    return new EditProfileInformationState();
  }
}

class EditProfileInformationState extends State<EditProfileInformation> {
  Stream<int> dbCall;
  final StreamController _controller = new StreamController<int>();
  final myController = TextEditingController();

  @override
  void initState() {
    super.initState();
    dbCall = _controller.stream;
    myController.addListener(_printLatestValue);
    new Future<void>.delayed(const Duration(seconds: 1)).then((_) {
      _controller.add(1);
    });
  }

  void _printLatestValue() {
    print("Second text field: ${myController.text}");
  }

  @override
  void dispose() {
    myController.removeListener(_printLatestValue);
    myController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: new AppBar(
        title: const Text(
          'Edit profile',
        ),
      ),
      body: new StreamBuilder<int>(
          stream: dbCall,
          builder: (BuildContext context, AsyncSnapshot<int> snapshot) {
            if (snapshot.connectionState == ConnectionState.active) {
              print(snapshot.data);
              return new Container(
                child: new Column(
                  children: <Widget>[
                    Padding(
                      padding: const EdgeInsets.all(8.0),
                      child: TextField(
                        controller: myController,
                      ),
                    ),
                    new Text(snapshot.data.toString()),
                  ],
                ),
              );
            } else if (snapshot.connectionState == ConnectionState.waiting) {
              return const Center(child: const CircularProgressIndicator());
            } else {
              return Center(
                child: Row(
                  crossAxisAlignment: CrossAxisAlignment.center,
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: const <Widget>[
                    Padding(
                      padding: const EdgeInsets.all(8.0),
                      child: const Icon(Icons.error),
                    ),
                    Text('Error loading data')
                  ],
                ),
              );
            }
          }),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          _controller.add(1);
        },
        child: const Icon(Icons.done),
      ),
    );
  }
}

So, I figured this out. When I do this on the first page, it works fine. But, when I navigate to another page and perform the same operation, I'm able to reproduce it. Can you please look into this ?