title: 'package:flutter/src/widgets/will_pop_scope.dart': Failed assertion: line 135 pos 12: '_route == ModalRoute.of(context)': is not true
body: <p>I am using Getx State Management.
  I have a LOGINSCREEN and its GetxController. In that GetxController I have defined a FormKey like this <code>final formKey = GlobalKey&lt;FormState&gt;();</code></p>
  <p>When from any other screen I navigate directly back to LOGINSCREEN (For SignOut) using this <code>Get.offAllNamed(Routes.loginScreen);</code> I face this issue.</p>
  <p>I tried <code>flutter clean</code>, but it does not work.
  I can't seem to find workaround for this.</p>
  <p>It would be a great help if anyone can find solution for this.</p>
  <pre><code>he following assertion was thrown building Form-[LabeledGlobalKey&lt;FormState&gt;#f1349](state: FormState#45516):
  'package:flutter/src/widgets/will_pop_scope.dart': Failed assertion: line 135 pos 12: '_route == ModalRoute.of(context)': is not true.
  2
  
  Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.
  In either case, please report this assertion by filing a bug on GitHub:
    https://github.com/flutter/flutter/issues/new?template=2_bug.md
  
  The relevant error-causing widget was
  Form-[LabeledGlobalKey&lt;FormState&gt;#f1349]
  lib\…\login_screen\login_screen.dart:40
  When the exception was thrown, this was the stack
  #2      _WillPopScopeState.didUpdateWidget
  package:flutter/…/widgets/will_pop_scope.dart:135
  #3      StatefulElement.update
  package:flutter/…/widgets/framework.dart:4682
  #4      Element.updateChild
  package:flutter/…/widgets/framework.dart:3293
  #5      ComponentElement.performRebuild
  package:flutter/…/widgets/framework.dart:4520
  #6      StatefulElement.performRebuild
  package:flutter/…/widgets/framework.dart:4667
  </code></pre>
  <p><strong>LoginScreen</strong></p>
  <pre><code>class LoginScreen extends StatelessWidget {
    final controller = Get.find&lt;AuthController&gt;();
    @override
    Widget build(BuildContext context) {
      return Column(
        children: [
  Form(
                      key: controller.formKey,
                      child: Column(
                        children: [
                          TextFormField(
                            controller: controller.phoneController,
                            keyboardType: TextInputType.phone,
                            style: TextStyles.black14,
                            decoration: InputDecoration(
                                hintText: 'Phone Number',
                                hintStyle: TextStyles.hintStyle14,),
                            validator: (value) {
                              print(value);
                              if (value.length != 10) {
                                return 'Invalid phone number';
                              }
                              return null;
                            },
                          ),
  TextButton(
            onPressed: () {
              controller.login();
            },
            child: Text('Login'))
  ],
      );
    }
  }
  </code></pre>
  <p><strong>Controller</strong></p>
  <pre><code>import 'package:app/routing/routes.dart';
  import 'package:app/utilities/shared_prefs.dart';
  import 'package:flutter/material.dart';
  import 'package:get/get.dart';
  
  class AuthController extends GetxController {
    //Handling loading state
    bool loading = false;
  
    final formKey = GlobalKey&lt;FormState&gt;();
  
    login() async {
      if (!formKey.currentState.validate()) return;
      loading = true;
      update();
  
      //API CALL
    }
  
    //Sign out user
    signOut() async {
      SharedPrefs().clear();
      Get.offAllNamed(Routes.loginScreen);
    }
  }
  
  </code></pre>
  <p>Here is the flow.
  LoginScreen --&gt; HomeScreen --&gt; OtherScreen</p>
  <p>Calling <code>controller.signOut()</code> from OtherScreen causes this error</p>