title: paramMap item always returns null using Angular 8 routing
body: <p>I'm using Angular 8 to get some params or data from the route but it's always empty.
  My component is inside a lazyloaded module named 'message'.</p>
  
  <p><strong>app-routing.module.ts:</strong></p>
  
  <pre class="lang-js prettyprint-override"><code>...
  
  {
    path: 'message',
    loadChildren: () =&gt;
      import('./systems/message/message.module').then(
        m =&gt; m.MessageModule
      )
  },
  
  ...
  </code></pre>
  
  <p><strong>message-routing.module.ts:</strong></p>
  
  <pre class="lang-js prettyprint-override"><code>...
  
  const routes: Routes = [
    {
      path: '',
      component: MessageIndexComponent,
      children: [{ path: ':folder', component: ComponentMessageListComponent }]
    },
    { path: 'add', component: MessageAddComponent },
    { path: 'list', component: MessageIndexComponent }
  ];
  
  ...
  </code></pre>
  
  <p><strong>component-message-list.component.ts:</strong></p>
  
  <pre class="lang-js prettyprint-override"><code>...
  
  constructor(
    private route: ActivatedRoute
  ) {}
  
  ngOnInit() {
    console.log(this.route.snapshot.paramMap.get('folder'));
     // Change list on date change
    this.route.paramMap.subscribe(params =&gt; {
      console.log(params.get('folder'));
    });
  }
  
  ...
  </code></pre>
  
  <p>Both consoles are returning NULL when routing to this address:</p>
  
  <blockquote>
    <p>/message/inbox</p>
  </blockquote>
  
  <p><strong>UPDATE:</strong></p>
  
  <p>I'm navigating to the route by writing the address directly to the browser:</p>
  
  <blockquote>
    <p><a href="http://127.0.0.1:4200/message/inbox" rel="nofollow noreferrer">http://127.0.0.1:4200/message/inbox</a></p>
  </blockquote>
  
  <p>or by an anchor tag</p>
  
  <p><strong>message-index.component.html</strong></p>
  
  <pre class="lang-html prettyprint-override"><code>...
  
    &lt;a class="list-group-item list-group-item-action d-flex p-3" routerLink="inbox" routerLinkActive="active"&gt;
      Inbox
    &lt;/a&gt;
  ...
  
  </code></pre>
  
  <p>And always the param is null</p>