swift - 来自公共 NSPersistentCloudKitContainer 的记录在几秒钟内同步到 iCloud，但仅在启动时从物理设备？

Question

我目前正在开发的 iPhone 应用程序适用于 iOS >= 14.0 应用程序记录的很大一部分使用 AppDelegate 中的以下命令共享到公共 iCloud 容器：

    lazy var persistentContainerPublic: NSPersistentCloudKitContainer = {

    let container = NSPersistentCloudKitContainer(name: "PublicModel")
    
    guard let description = container.persistentStoreDescriptions.first else {
        print("Can't get description")
        fatalError("\(#function): ERROR")
    }
    
    description.setOption(true as NSNumber, forKey: NSPersistentHistoryTrackingKey) // https://developer.apple.com/videos/play/wwdc2020/10650
    description.setOption(true as NSNumber, forKey: NSPersistentStoreRemoteChangeNotificationPostOptionKey) // https://developer.apple.com/videos/play/wwdc2020/10650
    description.cloudKitContainerOptions?.databaseScope = .public

    
    container.loadPersistentStores(completionHandler: { (storeDescription, error) in
        if let error = error as NSError? {
              
            fatalError("Unresolved error \(error), \(error.userInfo)")
        } else {
            print("\(type(of: self)) - loadPersistentStores completed sucessful")
        }
    })
    return container
}()

记录在几秒钟内同步到 iCloud 容器，但仅在启动时同步到物理设备，有时我使用以下代码获取新记录：

   private var pullControl = UIRefreshControl()

   pullControl.attributedTitle = NSAttributedString(string: "")
    pullControl.addTarget(self, action: #selector(refreshListData(_:)), for: .valueChanged)
    tableView.refreshControl = pullControl

    @objc private func refreshListData(_ sender: Any) {
    fetchDocuments()  // fetch all records from core data
    tableView.reloadData()
    refreshPublicObjects()
    self.pullControl.endRefreshing()
}

这是 refreshPublicObjects 函数：

    func refreshPublicObjects () {
   let appDelegate = UIApplication.shared.delegate as? AppDelegate
        
    let persistentContainer = appDelegate?.persistentContainerPublic
    persistentContainer?.viewContext.refreshAllObjects()

}

我是否缺少任何东西来及时从 iCloud 获取更新，而不仅仅是在启动时，甚至用户都没有刷新表格视图？