In Ionic 2 on Android, the app is visible on the lock screen if the app was active when the device locked

I'm running into a major issue with an app I'm working on. The app is running Ionic 2. Android is the only platform affected.

Currently, if the phone goes to sleep with the app active, when the phone wakes up and is locked, the app is visible in the background (as seen in the screenshot below). This doesn't seem like normal behavior.

What is causing this behavior and how do I stop it?

As seen here:

Cordova CLI: 6.5.0
Ionic Framework Version: 2.2.0
Ionic CLI Version: 2.2.1
Ionic App Lib Version: 2.2.0
Ionic App Scripts Version: 1.1.4
ios-deploy version: 1.9.1
ios-sim version: 5.0.13
OS: macOS Sierra
Node Version: v6.9.4
Xcode version: Xcode 8.3.1 Build version 8E1000a