HTTP.POST() not working after screen-lock (iOS 9.3.5)

[JSNG94]

Hello,

I called HTTP.POST() after screen-lock with iPad Mini first generation(iOS 9.3.5).
HTTP.POST(GlobalDefine.remotebleEndPoint, parameters: posts, headers: CloudConnector.getHTTPRequestHeader()){
Response in
// do something
})

Then, I got the below response from HTTP.POST().

After I received this response, I checked the log of my Cloud API server. There are no any signs as the access from the app.

This issue is just happening at the first called of HTTP.POST() after screen-lock. The second called of HTTP.POST() will be fine.

Moreover, this issue seems like just happened in iOS 9 because I tested with other device(iPhone) with iOS 11.2.2. It is working well.

Hope the above information can help for your debugging.

Best Regards,
Jackson