Badge not updating and no notification when app is closed

I have followed all the instructions for setting up on android. Notifications come through when the app is running in the background. The notification count doesnt appear on the app icon. When the app is closed nothing comes up. Is this an error or is there something I have missed?

No source file, test, or entry point is identified in the issue. Start by reproducing the Android behavior with the app in the background and fully closed, checking both notification delivery and the badge count; done means the intended behavior is confirmed or the failure is isolated to a specific platform path.

Written by the indexing model from the issue text.