ios – Notificaton服务扩展无法正常工作

当我发送mutable-content时,没有显示通知：1,推送有效负载既不会到达Notification服务扩展中的断点,但是如果没有显示可变内容推送,Notification内容扩展也正常工作.我没有修改Notification服务扩展中的代码,它是 xcode生成的默认代码.在创建通知服务扩展时我是否遗漏了某些内容,或者可能是设备设置的问题.我几天前在同一台设备上进行了测试,通知服务扩展工作正常.

以下是我的服务扩展代码

import UserNotifications

class Notificationservice: UNNotificationserviceExtension {

    var contentHandler: ((UNNotificationContent) -> Void)?
    var bestAttemptContent: UNMutableNotificationContent?

    override func didReceive(_ request: UNNotificationrequest,withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
        self.contentHandler = contentHandler
        bestAttemptContent = (request.content.mutablecopy() as? UNMutableNotificationContent)

        if let bestAttemptContent = bestAttemptContent {
            // Modify the notification content here...
            bestAttemptContent.title = "\(bestAttemptContent.titlE) [modified]"

           contentHandler(bestAttemptContent)
        }
    }

    override func serviceExtensionTimeWillExpire() {
        // Called just before the extension will be terminated by the system.
        // Use this as an opportunity to deliver your "best attempt" at modified content,otherwise the original push payload will be used.
        if let contentHandler = contentHandler,let bestAttemptContent =  bestAttemptContent {
            contentHandler(bestAttemptContent)
        }
    }
}

编辑1：下面是我的推送有效载荷

{  
   "aps":{  
      "sound":"default","mutable-content": 1,"category": "myCategory","alert":{  
         "body":"this is a custom push","subtitle":"subtitle of the push","title":"Push Test"
      }

   }
}

edit1：问题出现在10.2.1上运行的特定设备上,我检查了运行在10.2上的其他设备,它触发了Notification服务扩展.