For iPad the problem is a bit different. It only kicks in if I have the device rotated when the UE4 splash screen takes over. Will debug, suspect it’s picking the right screen based on device orientation but not locking the device to that orientation (so my “fix” above doesn’t work, but nor does the UE4 splash screen).
If that’s right the correct minimal fix approach for ipad would be to lock the orientation to whatever was selected when the UE4 splash is created.