Login form no interaction with the keyboard (Tab and goto)

Ionic Framework ionic-v3
1

Hello,
We are working on an app project with ionic3 for android and having an issue with login form that doesn’t interact with the keyboard (I mean the button on the bottom left goto and tabulation )
Here is the code :

<ion-list class="login" >
  <ion-item>
    <ion-input placeholder="Login" [(ngModel)] = "username"></ion-input>
  </ion-item>
  <ion-item>
   <ion-input type="password" placeholder="Password" [(ngModel)] = "pass"></ion-input>
  </ion-item>
  
  </ion-list>
  <div padding>
    <button ion-button float-center button-clear-outline (click)="connect()">Login</button>
  </div>

Any help please?
Thank you in advance