App minimize / close for camera plugin

Ionic Native
1

My app will minimize whenever i call this.camera.getPicture() or

this.androidPermissions.requestPermissions(
            [
                this.androidPermissions.PERMISSION.CAMERA,
                this.androidPermissions.PERMISSION.CALL_PHONE,
                this.androidPermissions.PERMISSION.GET_ACCOUNTS,
                this.androidPermissions.PERMISSION.READ_EXTERNAL_STORAGE,
                this.androidPermissions.PERMISSION.WRITE_EXTERNAL_STORAGE
            ]
    );

i can open the native app from my app stacks, and it will properly show me the dialog to grant permissions or selecting a photo from photo album,but i have to repeatedly open the app back from the app stacks, please help

i have this in my androidmanifest.xml

<uses-feature android:name="android.hardware.camera" />
    <uses-permission android:name="android.permission.CAMERA" />

and this in my config.xml

<feature name="Camera">
     <param name="android-package" value="org.apache.cordova.camera.CameraLauncher" />
</feature>
<plugin name="cordova-plugin-camera" spec="^4.0.3" />