White page when going back after opening app with push notification

Hi, I am currently testing OneSignal push notifications in my app. When a user open the app with a notification, they will be redirected to an level 2 page in the app.

It seems like this is causing an issue when the app was closed when the user opens the app with the notification. The user is redirected to the page that has been set as Launch URL in OneSignal. But when you click on the back button in the Top Navigation Bar, there appears a blank screen and the apps crashes. How can I fix this issue? Thanks in advance.