Swift - Firebase: App needs to be deleted from iPhone after update via Apple TestFlight.

[Peter de Vries]

Using Swift (Xcode Version 7.3.1), Firebase 3.0, 

I had an update for my app, let it go out (via TestFlight) to testers, but they cannot take advantage of the new screens in the app that require data retrieval from Firebase Database. 

It works fine if they delete the app from the phone and install a new copy; at that point the new screen is retrieving data form firebase.

I tried to reproduce this at home, but could not exactly do so, as I cannot install the older beta testing version once a new one is released, so:

I put on a older version on the iPhone (via Xcode, which did not have the new screen) and then:

updated this via Xcode with new version: no problems in retrieving the data (the new screen)

updated this via the TestFlight version: no problems in retrieving the data (the new screen)

However 2 testers had this problem of no data retrieval on the new screen (VC), do I have to be concerned? 

Is this problem from Firebase or Apple’s side where they only update those sections within the app that changed.

If so, will I have this problem when the app goes live, obviously I cannot ask users to delete and download the app again with each revision.

Has anyone else come across this problem? Any suggestions are much appreciated.

Peter