When using OneSignal for push notifications, the default behavior when receiving a push notification when app is in foreground is to show it as an alert. 

We have a customizable option to modify this default behavior. 

To enable this feature, you must add "inFocusDisplay": "none" under "services" -> "oneSignal" section in appConfig.json, or in Import/Export section when editing your app.

"services": {
  "oneSignal": {
  "active": true,
  "applicationId": "xxxxx",
  "inFocusDisplay": "none"
}
}