v15.2.12 IWModalWindow doesn't work

[Encina]

v15.2.12 is ok

procedure TIWForm1.IWAppFormCreate(Sender: TObject);
begin
With IWModalWindow1 do
  begin
    Reset;
    Autosize := False;
    Title := 'Test';
    Draggable := False;
    Src := 'http://cdn07.foxitsoftware.cn/pub/foxit/manual/cPDF/zh_cn/FoxitConnectedPDF_Manual.pdf';
    OnAsyncClick := nil;
    Show;
  end;
end;