bug: android back button not working on capacitor 3 with ionic.

Bug Report

Capacitor Version

Capacitor Doctor   

Latest Dependencies:

  @capacitor/cli: 2.4.7
  @capacitor/core: 2.4.7
  @capacitor/android: 2.4.7
  @capacitor/ios: 2.4.7

Installed Dependencies:

  @capacitor/ios: not installed
  @capacitor/cli: 3.0.0-beta.6
  @capacitor/core: 3.0.0-beta.6
  @capacitor/android: 3.0.0-beta.6

Platform(s)

Android

Current Behavior

The app closes when tapping the android back button instead of going back to the last route. In this case that’s the tab1 route.

Expected Behavior

The app should go to the last route when tapping the android back button. In this case that’s the tab1 route.

Code Reproduction

1. Clone: https://github.com/RaphaelWoude/Example
2. Run the following commands:

npm install
npm run build
npm run sync
npm run copy
npm run android

1. Build with android studio.
2. Start the app.
3. Click on the test button.
4. Press the hardware back button.

Other Technical Details

npm --version output: 6.14.10 node --version output: v14.15.4 pod --version output (iOS issues only):

Additional Context

I have provided a v2 version branch of the app in the same repository. This one does exactly what the app should do by going back to the last route. Here is also a video running on version 3 that shows that the ionic back button works but as soon as I tap the android back button it closes the app.

https://user-images.githubusercontent.com/47354694/110136780-610f6300-7dd0-11eb-896c-d305e8f65f05.mp4

[KirstenStake]

@ZXERSTON yes, what fixed it for me was installing the dependencies below (even if not referencing them directly in the app):

npm install @capacitor/app @capacitor/haptics @capacitor/keyboard @capacitor/status-bar

i had all of them already apart from @capacitor/app and as soon as I installed that one as well all was working again.

[RaphaelWoude]

I have added @capacitor/app, @capacitor/haptics and @capacitor/keyboard to the app and the android back button is still broken. Am I missing something?