Desing problem: Ionic 4 + navbar bootstrap + routing

Ionic Framework ionic-v3
1

Hi guys,

I have a problem with this code

<ion-app>
    <apaa-menu></apaa-menu>
    <ion-router-outlet main></ion-router-outlet>
</ion-app>

apaa-menu is a component with a , and ion-router-outlet my routing pages.

All pages that I print into ion-router-outlet was superimposed into my navbar.

Any idea¿