Apple review found problems on iPad running iOS 12.3.1 (ionic 3)

hello,
I am facing a similar issue. I have an application that is running fine in my real iPhone with iOS 12.3.1. It also runs fine with iOS 12.1 and 13 on the iPhone and iPad simulators. I have submitted the app to App Store and they are saying that the app opens to a white display on iPad running iOS 12.3.1 on Wi-Fi. Fine, so I just got a real iPad running iOS 12.3.1 and using Xcode 10.2 it does not run, however, using the beta version of the Xcode 11, the app runs fine on the iPad with iOS 12.3.1. I believe that it has something to do with the cordova-firebase plugin. Does anyone have any idea why there is such a problem with a real iPad device?