title: Ionic fab button not working at first click
body: <p>I'm using ion-fab button in my project like this : </p>
  
  <pre><code>&lt;ion-fab right item-end&gt;
      &lt;button ion-fab mini&gt;&lt;ion-icon name="arrow-dropleft"&gt;&lt;/ion-icon&gt;&lt;/button&gt;
      &lt;ion-fab-list side="left"&gt;
        &lt;button ion-fab color="danger" (click)="delete(user?._id)"&gt;&lt;ion-icon name="trash"&gt;&lt;/ion-icon&gt;&lt;/button&gt;
        &lt;button ion-fab color="secondary" (click)="modify(user?._id)"&gt;&lt;ion-icon name="cog"&gt;&lt;/ion-icon&gt;&lt;/button&gt;
      &lt;/ion-fab-list&gt;
  &lt;/ion-fab&gt;
  </code></pre>
  
  <p>This ion-fab is in an ion-item list.</p>
  
  <p>That work perfectly except at the first launch of my app. Nothing happens until I kill the app and re launch her. </p>
  
  <p>My ionic information : </p>
  
  <pre><code>Ionic:
  
  ionic (Ionic CLI)  : 4.1.0 (/usr/local/lib/node_modules/ionic)
  Ionic Framework    : ionic-angular 3.9.2
  @ionic/app-scripts : 3.1.11
  
  Cordova:
  
  cordova (Cordova CLI) : 8.0.0
  Cordova Platforms     : android 7.0.0, browser 5.0.3, ios 4.5.5
  Cordova Plugins       : cordova-plugin-ionic-keyboard 2.1.2, cordova-plugin-ionic-webview 2.0.2, (and 11 other plugins)
  
  System:
  
  ios-deploy : 2.0.0
  NodeJS     : v8.9.1 (/usr/local/bin/node)
  npm        : 5.10.0
  OS         : macOS High Sierra
  Xcode      : Xcode 9.4.1 Build version 9F2000
  </code></pre>