Ionic 4 hides the back button on some pages of my mobile application

Ionic Framework ionic-v3
1

Hello friends, please I have a problem on ionic 4
I would like to know why on my mobile application, when I open two successive pages I usually have the back button that disappears on one of the pages, before I get on the home page

<ion-buttons slot="start">
      <ion-back-button></ion-back-button>
    </ion-buttons>
2

This is a BUG in ionic 4 with uses MODAL???

For the solve this problem i created…

 <ion-buttons slot="start" >
            <ion-icon name="arrow-back" style="zoom:0.7; padding-left: 15px; padding-right: 15px"
                (click)="voltarModal()"></ion-icon>
        </ion-buttons>

    voltarModal() {
        this.modalCtrl.dismiss().then(() => {
            this.refresh.emit();
        });
    }

I hope this help! :wink:

3

Do u mind share ur route setting code, it should be like this:

{
      path: 'search',
      loadChildren: '../search/search.module#SearchPageModule'
},
{
      path: 'search/result',
      loadChildren: '../search-result/search-result.module#SearchResultPageModule'}
},