wrong filename encoding when importing a file

1. install Nuxeo 8.10
2. install .NET client:

   dotnet restore
     Restoring packages for /my/path/to/myprojet/myprojet.csproj...
     Installing System.Private.DataContractSerialization 4.1.1.
     Installing System.Runtime.Serialization.Xml 4.1.1.
     Installing System.Xml.XmlSerializer 4.0.11.
     Installing System.ComponentModel.EventBasedAsync 4.0.11.
     Installing WinInsider.System.Net.Http.Formatting 1.0.1.
     Installing NuxeoClient 1.0.0-beta-13281.
     Restore completed in 4,13 sec for /my/path/to/myprojet/myprojet.csproj.
   

3. import attached 行动计划 27 Oct 2017.pdf file through drag and drop
4. observe the Japanese encoding the filename is correctly encoded (see okScenario.png)
5. now delete the document and purge the trash
6. try again to import the file using the following piece .NET code (Nuxeo .NET client):

   using System;
   using NuxeoClient;
   using NuxeoClient.Wrappers;
   
   namespace NXP_thing
   {
     class Program
     {
   
       private static async System.Threading.Tasks.Task makeRequest()
       {
         Client client = new Client("http://localhost:8080/nuxeo/",
                         new Authorization("Administrator",
                                           "Administrator"));
         Document folder = client.DocumentFromPath("/default-domain/workspaces/testWorkspaceNXPTesting");
         Uploader uploader = client.Uploader()
                             .SetChunked(true)
                             .SetChunkSize(1024);
         await uploader.AddFile("/my/path/to/行动计划 27 Oct 2017.pdf")
                       .UploadFiles();
         Documents documents = (Documents)await uploader.Operation("FileManager.Import")
                                    .SetContext("currentDocument", folder.Path)
                                    .Execute();
         Console.WriteLine("inside the task");
       }
   
       static void Main(string[] args)
       {
         Console.WriteLine("Hello World!");
         System.Threading.Tasks.Task taskA = makeRequest();
         taskA.Wait();
         Console.WriteLine("after the wait");
       }
     }
   }
   

7. observe the filename is not UTF-8 encoded -> è¡å¨è®¡å 27 Oct 2017.pdf (see brokenScenario.png)

Both import methods use the FileManager.Import operation so it is very unlikely to be the culprit.