Firebase query not working when Persistence is Enabled in Firebase Realtime Database iOS

Firebase query not working when Persistence is Enabled in Firebase Realtime Database iOS (Swift)

Using Firebase (4.1.1) Using FirebaseDatabase (4.0.2)

Xcode Version 9.0 iOS Base Sdk iOS 11.0

Database.database().isPersistenceEnabled = true

Query is working fine when persistence is turned to false

sample query :

ref.child("user").queryOrdered(byChild: "name").queryEqual(toValue:"john")
   .observeSingleEvent(of: .value, with:  { (snapshot) in
});