Firebase auth web SDK not working on Ionic iOS? - ionic-framework

Question

My issue is the login with the email and password function works fine on android but on iOS, the promise is never returned ( nor failed ) when correct credentials are provided but it fails if I provide incorrect credentials. The login works on iOS with live reload simulating on an iOS device, but when installed with test-flight or via xCode promise is never returned nor rejected.
How can I debug it further or know what the underlying issue is?
onSubmit: async (values) => {
try {
const auth = getAuth(firebaseApp);
auth.setPersistence(browserSessionPersistence);
// Never called on IOS
auth.onAuthStateChanged(() => {
console.log('I am here', auth.currentUser);
if (auth.currentUser) {
updateIsAuthenticated(true);
}
});
const userCred = await signInWithEmailAndPassword(auth, values.email, values.password);
//Never runs
console.log('After Success', userCred);
} catch (error) {
// Runs when provided with false credentials
setError('Error: Authentication failed');
console.error('An error Occurred');
} finally {
console.log('Running Finally');
}
},
});