Instance index is wrong when other plugins are used

[asfktz]

plugins: [
    new HtmlWebpackPlugin({
      inject: true,
      template: './src/index.html',
    }),
    new AutoDllPlugin({
      debug: true,
      inject: true,
      filename: '[name]_[hash].js',
      path: './dll',
      entry: {
        vendor: [
          'react',
          'react-dom',
          'moment'
        ]
      }
    })
  ]

Should create an instance cache dir named: development_instance_0_73245b0499068c0b1433cfcfc30202b8

But we get instead: development_instance_1_73245b0499068c0b1433cfcfc30202b8

Without HtmlWebpackPlugin we get the correct index