demonstrate RTL issues with ionic 4 component ion-item

app.component.html

<ion-app>
  <ion-split-pane>
    <ion-menu when='md'>
      <ion-header>
        <ion-toolbar>
          <ion-title>Menu</ion-title>
        </ion-toolbar>
      </ion-header>
      <ion-content>
        
        <ion-list dir='rtl'>
          <ion-item>
            <ion-label>ion-item RTL</ion-label>
          </ion-item>
          <ion-item color="secondary">
            <ion-button slot="start" expand='full' size='default'>Start</ion-button>
            <ion-button expand='full' size='default'>Middle</ion-button>
            <ion-button slot="end" expand='full' size='default'>End</ion-button>
          </ion-item>
          <ion-item color="secondary">
            <ion-button slot="start" expand='full' size='default'>Start</ion-button>
            <ion-button expand='full' size='default'>Middle</ion-button>
          </ion-item>
          <ion-item color="secondary">
            <ion-button expand='full' size='default'>Middle</ion-button>
            <ion-button slot="end" expand='full' size='default'>End</ion-button>
          </ion-item>
        </ion-list>

        <ion-list dir='ltr'>
          <ion-item>
            <ion-label>ion-item LTR</ion-label>
          </ion-item>
          <ion-item color="secondary">
            <ion-button slot="start" expand='full' size='default'>Start</ion-button>
            <ion-button expand='full' size='default'>Middle</ion-button>
            <ion-button slot="end" expand='full' size='default'>End</ion-button>
          </ion-item>
          <ion-item color="secondary">
            <ion-button slot="start" expand='full' size='default'>Start</ion-button>
            <ion-button expand='full' size='default'>Middle</ion-button>
          </ion-item>
          <ion-item color="secondary">
            <ion-button expand='full' size='default'>Middle</ion-button>
            <ion-button slot="end" expand='full' size='default'>End</ion-button>
          </ion-item>
        </ion-list>
      </ion-content>
    </ion-menu>
    <ion-router-outlet main></ion-router-outlet>
  </ion-split-pane>
</ion-app>