webpack-dev-server: "webpack-dev-server --progress --inline" reloading page on devServer timeout

I guess proxy timeout (just the way backend works) triggers page reload. Chrome Dev Tools screenshot: http://i.imgur.com/aLoA4xm.png http://i.imgur.com/3WSpBmc.png

Chromium 46.0.2490.71 nodejs v4.2.4 webpack 1.12.11 webpack-dev-server 1.14.1

webpack.config.js:

var autoprefixer = require('autoprefixer')
var path = require('path')
var webpack = require('webpack')


module.exports = {
    entry: {
        app: path.resolve(__dirname, 'app', 'index.js'),
    },
    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: '[name].js'
    },
    module: {
        loaders: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                loader: 'babel-loader',
                query: {
                    compact: false,
                    cacheDirectory: true,
                    presets: ['es2015', 'react'],
                },
            },
            {
                test: /\.css$/,
                loader: 'style!css'
            },
            {
                test: /\.scss$/,
                loaders: ['style', 'css', 'postcss', 'sass']
            },
            {
                test: /\.(png|jpg|gif)$/,
                loader: 'url-loader?limit=4096&name=[name].[ext]'
            },
            {
                test: /\.(html|svg|eot|woff|woff2|ttf)$/,
                loader: 'file?name=[name].[ext]'
            }
        ]
    },
    postcss: [
        autoprefixer({
            browsers: ['last 2 versions']
        })
    ],
    devServer: {
        proxy: {
            '/*': {
                target: process.env.SERVER,
                secure: false,
                changeOrigin: true,
            },
        },
    },
    plugins: (process.env.NODE_ENV == 'production') ? [
        new webpack.DefinePlugin({
            'process.env': {
                'NODE_ENV': JSON.stringify(process.env.NODE_ENV)
            },
        }),
        new webpack.optimize.UglifyJsPlugin({
            compress: {
                warnings: false
            }
        }),
        new webpack.optimize.DedupePlugin(),
    ] : [],
}