Realm User Session for Non Admin not completing

gistfile1.txt

SyncUser.logIn(with: credentials,
                       server: RealmURL.authentication,
                       timeout: 10) { user, error in
            if let user = user {
                print("Successfully signed in.")
                
                let appDel = UIApplication.shared.delegate as! AppDelegate
                appDel.initializeRealmConfigs()
                
                let _ = RealmHelper.getRealmFor(configuration: RealmConfig.userObjectRealm!)
                guard let session = user.session(for: RealmURL.userObjects) else {
                    return
                }

                self.token = session.addProgressNotification(for: .download, mode: .forCurrentlyOutstandingWork) { progress in
                    if progress.isTransferComplete { /******* This line is never hit *******/
                        self.token?.stop()
                        
                        DispatchQueue.main.async {
                            self.removeActivityIndicator()
                        }
                    }
                }
            }