Symbols in shared folder of virtual window with Windows 10 host

I am running a linux (ubuntu) system in a virtual container. I used symbolic links in the shared directory, which required some extra work, described here: https://www.virtualbox.org/ticket/10085

This worked very well for my Windows 8 host requirements. Now I have switched to Windows 10 and symlinks no longer work. I can still create symbolic links, but the correct path cannot be resolved.

Using readlink I can see that the generated symbolic link is not correct. If I create a symbolic link with

ln -s /media/data/jquery.js /media/data/test.js 

      

        
        
        
      

    

return value using readlink

\media\data\jquery.js

      

        
        
        
      

    

Obviously the directory separator is wrong. If I create a symbolic link outside of the shared directory (in the same file in the shared directory) the path is correct.

Does anyone know how to fix a wrong directory separator?

Matthias