Trouble with Opening URL from Push Notification in App on Android

We are sending out Push notification from our app using OneSignal. The notifications are going out fine.

We want the app to open when a user tap the notification. To do this, we're using the instructions from GoNative here: https://gonative.io/docs/open-url-from-notification

Whether we send from the OneSignal UI or the API this works in all iOS devices we try. It will also work on Android if the app is already in memory.

However, if the user has completely closed the app (viewed all open apps and swiped up) the tapping the notification does NOT open our app. Tapping the notification just makes it go away and nothing loads.

Ideas?