Empty component on router.back

[Tompote]

Hi !
I'm trying to handle the android back button behaviour.
By default, pushing the button closes the app, but in my case it would be better to use the router.back().

So I simply added this code (coming from a fresh seed) inside app.component.ts:

ngOnInit() {
    if (!isAndroid) {
        return;
    }

    application.android.on(application.AndroidApplication.activityBackPressedEvent, (data: application.AndroidActivityBackPressedEventData) => {
        data.cancel = true;
        this.router.back(); // from RouterExtensions
    });
}`

When I push the back button I can see the app is navigating back (the active menu link changes) but it shows an empty component.

I tried the same code using Nativescript Playground as I thought it was a routing context problem, but it worked fine in every configurations (with one or multiple routers, with and without page-router-outlet...).
Here is a sample that works fine: PlaygroundSample.

Surely there is something I'm missing but I don't have any clues on what could cause different behaviour between the seed and the default playground project.
If someone could point me on the right direction that would be a huge help :)