Starting from JRE 8u91 the fields "Application" and "Publisher" are displayed as "UNKNOWN" in security warning dialog caused by a call from JavaScript to Java through "LiveConnect", when the user's applet is loaded in .NET Windows Forms application through .NET control "WebBrowser".

Documentation on .NET "WebBrowser" control: https://docs.microsoft.com/en-us/dotnet/framework/winforms/controls/webbrowser-control-overview