FileNotFoundException when tried to pick a file in Download Folder

[slam023]

Trying to select a file which shown in the list. After selected a file, file not found exception will turn up due to the file doesn't exist. I think it required to check the file existence after selected.

Exception turn up to be in here:

 handler = (s, e) => {
                    var tcs = Interlocked.Exchange (ref _completionSource, null);

                    FilePickerActivity.FilePicked -= handler;

                    tcs?.SetResult (new FileData (e.FilePath, e.FileName, () => System.IO.File.OpenRead (e.FilePath)));
                };