CommonsChunkPlugin does not work with the electron

Question

I have an electronic application that I create using Webpack 2. I have a custom module ( mymodule) that I want to be a standalone package referenced by other packages. The problem is that when I use CommonsChunkPluginwith my main process, the electron is blocked when the application starts. I see that the electronic logo appears in the document, but the window never appears.

Please note that it should not be the module that I wrote, I can use lodashwith CommonsChunkPluginand get the same result.

Interestingly, if I use CommonsChunksPluginwith the visualization process in the same way, everything works fine.

I put together a simple electronic application that shows this problem.

Github repo gives more detailed information about the situation, but here are the important parts:

basic electron process:

const mymod = require('./mymodule')

app.on('ready', function() {
    console.log(mymod.abc);

    mainWindow = new BrowserWindow({width: 800, height: 600});

    mainWindow.loadURL(url.format({
        pathname: require('./index.html')
    }));
});

Webpack configuration for main:

entry: {
    main: path.join(__dirname, './main.js'),
    mymod: ['./mymodule']
},

output: {
    path: __dirname + '/build/',
    publicPath: __dirname + '/build/',
    filename: '[name].bundle.js'
},


plugins: [
    new webpack.optimize.CommonsChunkPlugin('mymod')
]

In this state, the application will not work. If you go to the file webpack.main.jsand comment out the usage CommonsChunkPluginin these lines, it will start working:

entry: {
    main: path.join(__dirname, './main.js'),
    // mymod: ['./mymodule']
},

output: {
    path: __dirname + '/build/',
    publicPath: __dirname + '/build/',
    filename: '[name].bundle.js'
},


plugins: [
    // new webpack.optimize.CommonsChunkPlugin('mymod')
]

Here is my environment information:

MacOS:    10.12.6
node:     v6.11.0
npm:      3.10.10
electron: v1.6.12
wepback2: 3.5.5

So what is going on here? Is this a bug with electron, webpack or my code?