Swift CallerID扩展的最大限制

我已在我的应用程序中包含呼叫者分机。存储数字有限制吗？当我试图保存27000个以上的数字时，它会将我抛出

Error Domain=com.apple.CallKit.Error.calldirectorymanager code=2”（空）

（基本上加载中断）。我尝试过搜索文档，但找不到。有人能告诉我正确的方向吗

func addAllIdentificationPhoneNumbers(to context: CXCallDirectoryExtensionContext) {
    
    let list = CallerExtensionHelper.shared.getPhoneList()//List of sorted phone numbers and description fetched from coreData
    if list != nil, let numbers = list as? [CallerID]{
                    context.removeAllIdentificationEntries()
        for savedNumber in numbers{
            let number:CXCallDirectoryPhoneNumber = savedNumber.number
                context.addIdentificationEntry(withNextSequentialPhoneNumber: number, label: savedNumber.name!)
        }
    }
}