bug: Hardware Back Button does not update property-binding

[jonashammerschmidt]

Bug Report

Ionic version:
[x] 4.x

Current behavior:
When I subscribe to the "Hardware Back Button"-Event I can do stuff, like showing a toast with an increasing counter, but the property-binding to the view does not refresh the value.

Expected behavior:
When the property is bound to the view and the "Hardware Back Button" is subscribed the view should update its properties after the subscribed event occured.

Steps to reproduce:
Repo: https://github.com/jonashammerschmidt/ionic-issue-hardware-back-button

1. Clone, Build and deploy the repo on an android device.
2. Press the "Add"-button to increase the counter.
3. Press the "Hardware Back Button" to show a toast with the counter value, but the content-view is not updating.

Ionic Info

Ionic:

   Ionic CLI                     : 5.2.3 (/Users/b600609/npm-global/lib/node_modules/ionic)
   Ionic Framework               : @ionic/angular 4.7.1
   @angular-devkit/build-angular : 0.801.3
   @angular-devkit/schematics    : 8.1.3
   @angular/cli                  : 8.1.3
   @ionic/angular-toolkit        : 2.0.0

Cordova:

   Cordova CLI       : 9.0.0 (cordova-lib@9.0.1)
   Cordova Platforms : android 8.0.0
   Cordova Plugins   : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 4.1.1, (and 4 other plugins)

Utility:

   cordova-res : 0.6.0 
   native-run  : 0.2.8 

System:

   Android SDK Tools : 26.1.1 (/Users/b600609/Library/Android/sdk)
   NodeJS            : v10.15.3 (/usr/local/bin/node)
   npm               : 6.9.0
   OS                : macOS Mojave
   Xcode             : Xcode 10.2.1 Build version 10E1001

I hope you can help me guys!

[liamdebeasi]

Thanks for the issue. We have published a dev build of Ionic with this fix. You can install it using npm i @ionic/angular@4.8.0-dev.201907311410.3d6c56d.

Can you give that dev build a try and let me know if it resolves your issue? Thanks!

[jonashammerschmidt]

Yeah, the issue got resolved by this change!

[ionitron-bot]

Thanks for the issue! This issue is being locked to prevent comments that are not relevant to the original issue. If this is still an issue with the latest version of Ionic, please create a new issue and ensure the template is fully filled out.