ionic v4.0.0-beta.0 Tabs buttons hangs and cause app restart after routing to a non-tag page

[jing-zhou]

Bug Report

Ionic Info
Run ionic info from a terminal/cmd prompt and paste the output below.

wjz@bj:~/ion/ionic-conference-app$ ionic info

Ionic:

   ionic (Ionic CLI)          : 4.0.3 (/home/wjz/.nvm/versions/node/v10.7.0/lib/node_modules/ionic)
   Ionic Framework            : @ionic/angular 4.0.0-beta.0
   @angular-devkit/core       : 0.7.0-rc.3
   @angular-devkit/schematics : 0.7.0-rc.3
   @angular/cli               : 6.0.8
   @ionic/ng-toolkit          : 1.0.0-rc.9
   @ionic/schematics-angular  : 1.0.0-rc.9

Cordova:

   cordova (Cordova CLI) : 8.0.0
   Cordova Platforms     : android 7.1.1

System:

   Android SDK Tools : 26.1.1
   NodeJS            : v10.7.0 (/home/wjz/.nvm/versions/node/v10.7.0/bin/node)
   npm               : 6.2.0
   OS                : Linux 4.4

Environment:

   ANDROID_HOME : /home/wjz/Android/Sdk
   HTTP_PROXY   : http://127.0.0.1:42266/
   http_proxy   : http://127.0.0.1:42266/
   HTTPS_PROXY  : http://127.0.0.1:42266/
   https_proxy  : http://127.0.0.1:42266/

wjz@bj:~/ion/ionic-conference-app$

Describe the Bug
A clear and concise description of what the bug is.

Steps to Reproduce
Steps to reproduce the behavior:

1. from CLI, git clone ionic-conference-app ; go to /directoy/of/ionic-conference-app; checkout branch 'core-update'.

2. from CLI, enter 'ionic s'

3. go to browser (Chrome). the application started at 'http://localhost:8100'
   
   

4. from either side menu or tabs, press buttons "Schedule", "Speakers" or "About"; everything works fine.

5, from side menu, press "Login", login page appears; click the back button to return to side menu.

6, from side menu, press either "Schedule", "Speakers" or "About" , application just returns to the previous page of step 4; repeat step 6, no response, system hangs.

7, from tabs, press a button other than that of step 6, system restart, and everything works fine again.

8, repeat step 4 to step 7 to reproduce the problem

Related Code
If you are able to illustrate the bug with an example, please provide a sample application via an online code collaborator such as StackBlitz, or GitHub.

Expected Behavior
tabs work fine after routing to a non-tap page.

Additional Context
List any other information that is relevant to your issue. Stack traces, related issues, suggestions on how to fix, Stack Overflow links, forum links, screenshots, OS if applicable, etc.

[jing-zhou]

solved by #15054

[ionitron-bot]

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