The app does not start up with a dark screen

Unity Engine
,
1

We received a report from a user about an app that is being released that the app does not start up with a dark screen.
This app has been confirmed to work properly.

The user ’s device

iPad mini2
iOS 12.1.4

is.
I received a report that other apps are working without problems, so it does n’t seem to be a malfunction of the device.

I want to know when this phenomenon occurs and how to deal with it.

Development
Unity 2018.3.13f1
Xcode 10.1 (10B61)
macOS High Sierra (version 10.13.6)

is.
FirebaseSDK is implemented in the app.

Thank you.

2

Should your app start with a dark screen? Does it start with a light screen?

3

I have the same problem.
There is a problem that the app does not start from iPhone iOS 15.
After starting it about 3 to 10 times, the app is launched.
Unity 2021.1.22f
Using FirebaseSDK

4

Is your issue only on iOS 15? Do earlier versions work correctly? Can you reproduce? If so, can you debug in XCode? And it works 3 to 10 times, then stops working?

5

Hello,

I built my game with Xcode 13 and it couldn’t start on the second launch. My phone is an iPhone 6S+ with iOS 15.0.1
There was no problem before.