Flutter Web Url Navigation

HI ,
i am facing issues as below
As per your tutorial i kept url navigation which is working awesome, but i am not able to return to same page where i clicked refresh or reload in a particular page
**for example** :
i have navigated to Page 1 > Page 2 > Page 3 ( here i refresh or reloaded). now app is going
back to initialRoute page i.e. Page 1.

Can i store the Navigated Page so that i can return to same page if refresh or reload .

when i click on Back in chrome , below error is showing up :

```
Error: Assertion failed: org-dartlang-sdk:///flutter_web_sdk/lib/_engine/engine/history.dart:110:14
_userProvidedRouteName != null
is not true
at Object.throw_ [as throw] (http://localhost:60559/dart_sdk.js:4773:11)
at Object.assertFailed (http://localhost:60559/dart_sdk.js:4724:15)
at _engine.BrowserHistory.new.[_popStateListener] (http://localhost:60559/dart_sdk.js:143461:59)
```