File Globbing broken - Windows Network Drive

[kitsguru]

Node v4.2.1 npm v2.14.7 grunt v0.4.5 grunt-contrib-copy 0.8.1

{
  // twig
  expand: true,
  flatten: false,
  cwd: 'bower_components/Twig/lib/',
  src: [
         '**'
  ],
  dest: '<%= meta.deployPath %>lib/classes/vendor/'
},

fails on "ENOTSUP: operation not supported on socket, scandir"

Using single '*' does not throw error but also does not copy any files

This was working previously but recently broke when I updated a number of packages. Not sure what broke it.