Blank page after automatic reload

**I'm submitting a bug report**

* **Library Version:**
CLI `0.30.1`
Framework `1.1.4`

**Please tell us about your environment:**
* **Operating System:**
Windows 10

* **Node Version:**
6.9.4

* **NPM Version:**
4.1.1

* **Browser:**
Chrome 60 but I guess it happens in other browsers as well

* **Language:**
TypeScript 2.4.2

**Current behavior:**
From time to time my page stays blank after an automatic reload due to changes in the source code. If this happens I have to stop & restart the `watch` task which I've started with `au run --env my-env --watch`.

After the restart everything is back to normal for some time.

Until now I wasn't able to figure out what might causes the issue but can only tell that it happens very frequently (~ once every 5 - 10 minutes). Needless to say that having to restart the task that often is very distracting...

When this happens, my network tab shows me that the `vendor-bundle.js` is loaded but my `app-bundle.js` which usually follows afterwards is not.

Please let me know if I can give you any more information. I'd be really happy if we could somehow eliminate this issue!

Start by reproducing the issue with `au run --env my-env --watch` and observe the network requests during repeated source changes. Focus on the case where `vendor-bundle.js` loads but `app-bundle.js` does not; done means automatic reloads consistently restore the page without restarting the watch task.

Written by the indexing model from the issue text.