CloudKit network error on iOS14

I accepted some report of network error from users.

Error description is 

The operation could not be completed. (CKErrorDomain Error 3) | NSDebugDescription-> NSURLErrorDomain: -1009 | NSUnderlyingError-> Error Domain = NSURLErrorDomain Code = -1009 "Internet connection seems to be offline." UserInfo = { kCFStreamErrorCodeKey = 50,NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <9E971CA3-3F6A-418E-97F1-9AC1B1F78AED>.<52>, NSURLErrorNetworkUnavailableReasonKey=1, _NSURLErrorRelatedURLSessionTaskErrorKey=(  "LocalDataTask <9E971CA3-3F6A-418E-97F1-9AC1B1F78AED>.<52>"), NSErrorFailingURLStringKey=https://gateway.icloud.com/configuration/configurations/internetservices/cloudkit/cloudkit-1.0.plist, _kCFStreamErrorDomainKey=1,

There are some common conditions.

・On iOS14.0.0 or iOS14.0.1
・On request for CloudKit (There are success request on same condition. This error description request accepted from same user)
・On Cellular (In wifi condition, network is fine)

I can’t resolve this issue. Please give me this advice .
CloudKit network error on iOS14
 
 
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