Ionic 4 Nav Push not pushing Page

While developing a new (tabs based) ionic app, i tried to push a new page. I already tried this.navCtrl.navigateForward(MyComponent) and this.router.navigate(['tabs','my','component']). I injected the Router (or NavCtrl) in the constructor and made it private.


@Component({
  selector: 'app-stream',
  templateUrl: './stream.page.html',
  styleUrls: ['./stream.page.scss'],
})
export class Component {
  constructor(
    private router: Router,
    private navCtrl: NavController,
  ) {
  }

 public navigateRouter() {
  this.router.navigate(['some', 'url'])
 }

 public navigateNav() {
  this.navCtrl.navigateForward(OtherComponent)
 }
}

In both cases, the URL gets updated, but the page component wont be displayed.
This is an example, the real app could be found on github (currently in the feature/stream branch)
Git (Fixed commit)

I’m actually not so sure about my routing (anymore).
My goal is to have /tabs removed in the URL and have routes like:
/stream
/stream/locations/:locationId
/tab2
/tab3

src/app/app-routing.module.ts
src/app/tabs/tabs.router.module.ts
src/app/tabs/stream/stream.module.ts


(picture from augury chrome extension)
The red circled route is the route that i want to navigate to, but isn’t loaded

Any help is appreciated.

PS: i also tried the directive routerLink="MyComponent" in combination with routerDirection="forward"

Edit:
My Ionic Info output:


Ionic:

   ionic (Ionic CLI)             : 4.12.0 (/usr/local/lib/node_modules/ionic)
   Ionic Framework               : @ionic/angular 4.1.2
   @angular-devkit/build-angular : 0.13.6
   @angular-devkit/schematics    : 7.2.4
   @angular/cli                  : 7.3.6
   @ionic/angular-toolkit        : 1.4.1

Cordova:

   cordova (Cordova CLI) : 8.1.2 (cordova-lib@8.1.1)
   Cordova Platforms     : none
   Cordova Plugins       : cordova-plugin-ionic 5.3.0

System:

   ios-deploy : 2.0.0
   NodeJS     : v10.9.0 (/usr/local/Cellar/node/10.9.0/bin/node)
   npm        : 6.7.0
   OS         : macOS Mojave
   Xcode      : Xcode 10.1 Build version 10B61