Navigate to the base route of the app and use Augury to inspect the router tree, as illustrated:
Router Tree with eager loading mistakes
Everything, but initially required components, should be denoted with the [Lazy] attribute. If, for some reason, routes are not denoted with [Lazy], chances are that they are mistakenly being imported in app.module or some other component.
In the preceding screenshot, you may note that ProfileComponent and LogoutComponent are eagerly loaded, whereas the user module is correctly labeled as [Lazy]. Even multiple visual inspections through the tooling and the code base may leave you searching ...
