Environment:

• zone.js 0.8.13
• Node 6.11.1 (also tested 7.10.1)
• npm 5.2.0 (also tested v4)
• Angular 4.2.6
• rxjs 5.4.2
• Typescript 2.4.1
• webpack 3.2.0 (also tested 3.1.0)

What happened:
Restored node_modules (with no updates, but dependencies declared with ^) and app stopped working, completely, no errors...Period..

1. No content;
2. app-root hasn't been fullfilled by angular with app logic, we can see only static spinner;
3. No errors at all in console!

Tested on 3 dev machines with slightly different versions of node/npm. Result always was the same.
I've spent hours to find what was cause the problem, because we have hundreds of dependencies. Who could imagine that minor update (which updated automatically) in angular system dependency (which zone.js actually is) could lead to such unexpected behavior? With no errors at all!

0.8.12 works fine.