Expo SDK 48 broke Firebase Auth

I have just upgraded to Expo SDK 48 and it seems I am logged out after every refresh.
I downgraded back to SDK 47, and everything works as expected.
I am using firebase v9 (v9.17.1), installed with expo install not with yarn.

Steps I followed for upgrading to Expo 48:

• Update to the latest version of EAS CLI: npm i -g eas-cli.
• Install the new version of the Expo package: yarn add expo@^48.0.0
• Upgrade all dependencies to match SDK 48: npx expo install --fix
• Check for any possibly issues in your project dependencies: npx
  expo-doctor
• Upgraded to the latest version of the firebase web sdk: expo install firebase
• delete node modules, yarn.lock and reinstall everything

What am I missing ?

I could't find anything on the release notes that can help me.

I think I found the problem. Firebase uses a deprecated version of AsyncStorage, which apparently was removed in SDK 48.

I was able to fix it (more testing is ongoing) with this:

import AsyncStorage from "@react-native-async-storage/async-storage";

import {getReactNativePersistence, initializeAuth} from 'firebase/auth/react-native';

initializeAuth(app, {
  persistence: getReactNativePersistence(AsyncStorage);
});

With the persistence node, you tell Firebase to use the "native" AsyncStorage, i.e. the AsyncStorage that is present in current RN apps.

Take a look at the code where you are capturing the login event (onAuthStateChanged()) and how you are caching its results (typically by setting the user value in a state variable) and see how your app is behaving when code refreshes are happening.

My bet is that this might be a behaviour change in how Expo 48 (or more likely its underlying React or React-Native version) has, but that it isn't "wrong". Instead, my bet is that your code was "working" under pre-48 but that it wasn't/isn't actually correct.

Consider posting some code around where/how you are calling onAuthStateChanged(), and how you are using the value returned by it to render your UI.