Broken icons in Stack sample on Android

Navigation bar icons are broken in the Qt Quick Stack project template when running it on Android. See the screenshot below. 

Steps to reproduce: 

1. Create a new Qt Quick Application project for Android
2. Choose the Stack template
3. Launch the app on Android Emulator API 30, e.g. Pixel 4

This is kind of a deal breaker when you try to create your first mobile project... leaves a bad first impression about Qt's mobile capabilities