title: Ionic 3 - Scroll issue
body: <p>I am doing an Ionic 3 app and on some pages there is no scroll, like this page :</p>
  
  <p>History.html </p>
  
  <pre><code> &lt;ion-card *ngFor="let h of History; let i=index" text-wrap (click)="toggleGroup(i)" [ngClass]="{active: isGroupShown(i)}" class="HistoryPage"&gt;
      &lt;ion-card-header&gt;
           &lt;span class="title"&gt;{{h.nom_commun}}&lt;/span&gt;
           &lt;span class="date"&gt;{{h.date_signalement}}&lt;/span&gt;
           &lt;button (click)="openPage()" class="edit"&gt;
               &lt;ion-icon large name="create" color="mainColor" class="edit"&gt;&lt;/ion-icon&gt;
           &lt;/button&gt;
      &lt;/ion-card-header&gt;
      &lt;ion-card-content&gt;
  
          &lt;ion-icon color="success" item-right [name]="isGroupShown(i) ? 'arrow-dropdown-circle' : 'arrow-dropright-circle'" color="mainColor"&gt;&lt;/ion-icon&gt;
          &lt;br /&gt;
          &lt;div *ngIf="isGroupShown(i)"&gt;
              &lt;div class="up"&gt;
                  &lt;ion-slides class="Pictures" slidesPerView="3"&gt;
                      &lt;ion-slide&gt;
                          &lt;img src="{{h.image}}" /&gt;
                      &lt;/ion-slide&gt;
                      &lt;ion-slide&gt;
                          &lt;img src="../assets/img/rossignol3.jpg"  /&gt;
                      &lt;/ion-slide&gt;
                      &lt;ion-slide&gt;
                          &lt;img src="../assets/img/rossignol4.jpg"  /&gt;
                      &lt;/ion-slide&gt;
                      &lt;ion-slide&gt;
                          &lt;img src="{{h.pictures}}"  /&gt;
                      &lt;/ion-slide&gt;
                  &lt;/ion-slides&gt;
  
                  &lt;ion-list&gt;
                          &lt;p&gt;&lt;strong&gt;Nom codifié :&lt;/strong&gt; {{h.nom_codifie}}&lt;/p&gt;
                          &lt;p&gt;&lt;strong&gt;Etat actuel :&lt;/strong&gt; {{h.etat_actuel}}&lt;/p&gt;
                          &lt;p&gt;&lt;strong&gt;Date de réception :&lt;/strong&gt; {{h.date_reception}}&lt;/p&gt;
                          &lt;p *ngIf="h.date_renvoi"&gt;&lt;strong&gt;Date de renvoi en liberté :&lt;/strong&gt; {{h.date_renvoi}}&lt;/p&gt;
                          &lt;p&gt;&lt;strong&gt;Pays :&lt;/strong&gt; {{h.pays}}&lt;/p&gt;
                          &lt;p&gt;&lt;strong&gt;Lieu de signalement :&lt;/strong&gt; {{h.lieu_signalement}}&lt;/p&gt;
                          &lt;p&gt;&lt;strong&gt;Condition du signalement :&lt;/strong&gt; {{h.condition_signalement}}&lt;/p&gt;
                          &lt;p&gt;&lt;strong&gt;Numéro d'immatriculation :&lt;/strong&gt; {{h.immatriculation}}&lt;/p&gt;
                  &lt;/ion-list&gt;
  
              &lt;/div&gt;
          &lt;/div&gt;
  
      &lt;/ion-card-content&gt;
  &lt;/ion-card&gt;
  </code></pre>
  
  <p>History.ts :</p>
  
  <pre><code>import { Component } from '@angular/core';
  import { NavController } from 'ionic-angular';
  import { EditBirdPage } from '../EditBird/EditBird';
  import { BirdService } from '../../providers/bird-service';
  import { jQuery } from 'jquery';
  
  @Component({
    selector: 'page-History',
    templateUrl: 'History.html'
  })
  
  export class HistoryPage {
  
      History:any =[];
  
      constructor(public navCtrl: NavController, public serviceOne: BirdService) {
          this.serviceOne.getData().subscribe(
              data =&gt; this.History = data
          );
      }
  
      openPage() {
          this.navCtrl.push(EditBirdPage);
      }
  
      shownGroup = null;
  
      toggleGroup(group) {
          if (this.isGroupShown(group)) {
              this.shownGroup = null;
          } else {
              this.shownGroup = group;
          }
      };
  
      isGroupShown(group) {
          return this.shownGroup === group;
      };
  }
  </code></pre>
  
  <p>The scroll work only on page with basic text but with content which is generate or open manually ( like an accordion ) it's not working.</p>
  
  <p>Thanks for your help !</p>