Angular 2 lazy load error when loading class module within a bundle

I've been struggling with lazy load and modules in the last RC5.

I'm using a bundle for every module in my app. So I have main.bundle.js and moduleA.bundle.js

Then when I load my application I'm only loading main.bundle.js, being the routing for my app like this:

import { Routes, RouterModule } from '@angular/router';

const routes: Routes = [
  { 
    path: '', 
    redirectTo: 'main', 
    pathMatch: 'full'
  },
  {
    path: 'moduleA',
    loadChildren: 'moduleA.bundle.js#ModuleAModule'
  }
];

export const routing = RouterModule.forRoot(routes);

and this is my moduleA.module.ts

import { NgModule } from '@angular/core';

import { routing } from './moduleA.routing';
import { ModuleAComponent } from './';

@NgModule({
  imports: [ 
    routing 
  ],
  declarations: [
    ModuleAComponent
  ]
})
export default class ModuleAModule { }

My application loads fine, but when I navigate to moduleA, it loads the bundle but it fails to find the class.

Error: Uncaught (in promise): Error: Cannot find 'ModuleAModule' in 'moduleA.bundle.js'

In the documentation and other examples this is working because they don´t use a bundle, but the path to the ts file, but in my case this is a javascript file and it seems the class can´t be found.

I tried different combinations, with and without the default in the export of the module class, and with and without the #ModuleAModule in the loadChildren, but no luck. Either it doesn´t find the 'default' class inside the module or it can´t find the ModuleAModule inside the bundle.

I don´t know if this is an angular2 routing issue, a typescript issue,... Any idea on how to overcome this?