OK, I had to think about this one more time and i finally got it working 100%. Aside from the call to get all the user documents, I was making another call at the same time to the collection that was storing the values for isOnline. I added isOnline to the members model and a separate snapshot listener to monitor the changes to that key. Now everything is working 100%. Hope this helps anyone. I have updated my code: Service Class **This function is to update the user's presence when online or not and it's called inside SceneDelegate **  static func isUserOnline(bool: Bool) {     guard let currentUID = Auth.auth().currentUser?.uid else { return }           if !currentUID.isEmpty {       let dictionary = [USER_IS_ONLINE: bool as Any,              USER_LASTEST_ONLINE: Date().timeIntervalSince1970 as Any]               USERS_COLLECTION.document(currentUID).getDocument { (document, error) in         if let error = error {           print("Error..\(error.localizedDescription)")         } else {           if document?.exists == true {             USERS_COLLECTION.document(currentUID).updateData(dictionary)           } else {             USERS_COLLECTION.document(currentUID).updateData(dictionary)           }}}}} **SceneDelegate** func sceneDidDisconnect(_ scene: UIScene) {     Service.isUserOnline(bool: false)   }   func sceneDidBecomeActive(_ scene: UIScene) {     Service.isUserOnline(bool: true)   }   func sceneWillResignActive(_ scene: UIScene) {     Service.isUserOnline(bool: false)   }   func sceneDidEnterBackground(_ scene: UIScene) {     Service.isUserOnline(bool: false)   } **This function is to monitor the user activity**       static func checkUserOnlineStatus(with userId: String, completion: @escaping(Bool) -> Void) {     let query = USERS_COLLECTION.document(userId)           query.getDocument { (document, error) in       if let document = document, document.exists {         let isOnline = document.get(USER_IS_ONLINE) as? Bool ?? false         completion(isOnline)       }     }     query.addSnapshotListener { (document, error) in       if let document = document, document.exists {         let isOnline = document.get(USER_IS_ONLINE) as? Bool ?? false         completion(isOnline)       }}} Calling the function inside the cell class func configureHomeFeedCell(member: Member) {  Service.checkUserOnlineStatus(with: member.documentId) { isOnline in       self.onlineViewStatus.backgroundColor = isOnline == true ? .green : .red     } }

Thank you for the last suggestion, I ended moving the function from the cell class to the view controller and called it inside cellForRowAt, so far, it's working as expected. Here is the updated code: func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {     let hCell = homeFeedTableView.dequeueReusableCell(withIdentifier: "HomeFeedCell", for: indexPath) as! HomeFeedCell           hCell.selectionStyle = .none     hCell.backgroundColor = UIColor.white           if !members.isEmpty {       hCell.configureHomeFeedCell(member: self.members[indexPath.row])       checkUserOnlineStatus(with: members[indexPath.row].documentId) { isOnline in         hCell.onlineViewStatus.backgroundColor = isOnline == true ? .green : .red       }     }     return hCell   }           func checkUserOnlineStatus(with userId: String, completion: @escaping(Bool) -> Void) {     let query = USERS_COLLECTION.document(userId).collection(IS_ONLINE)     query.getDocuments { (snapshot, error) in       if let error = error {         print("ERROR..\(error.localizedDescription)")       } else {         snapshot?.documents.forEach({ diff in           let isOnline = diff.get(USER_IS_ONLINE) as? Bool           completion(isOnline!)         })}}       query.addSnapshotListener { (snapshot, error) in         snapshot?.documentChanges.forEach { diff in           let isOnline = diff.document.get(USER_IS_ONLINE) as? Bool           if (diff.type == .modified) {             completion(isOnline!)           }}}   }

Thank you Scott, yes, I was thinking on moving the function to the view controller, but, i need to add a delegate for the onlineViewStatus UIView as this is inside the cell.

My apologies, thats part of the Firebase Framework, but, basically my issue is when a field is updated tableView.reloadData() repeats the cell many times.