[firebase_auth]: Inconsistent uninstall behavior between Android and iOS for anonymous users

[Doublon]

Hi,

I'm using the firebase_auth library to authenticate anonymously with Firebase using the following code:

However, when I uninstall the application and run this code after reinstalling:

var auth = await FirebaseAuth.instance.signInAnonymously();
_appId = auth.user!.uid;

On Android: I receive a new user ID.
On iOS: I receive the previous user ID from the previous installation.
How can I achieve consistent behavior across both platforms, either receiving a new user or recovering the previous user?