title: ASSERT: _before() should be called while animating
body: <p>When I navigate from my dashboard ion menu to Login screen and after successfully logged in when I am trying to open ion menu again it automatically closed and got this error.</p>
  <pre><code>Ionic:
  
     Ionic CLI                     : 5.4.16 (/usr/lib/node_modules/ionic)
     Ionic Framework               : @ionic/angular 5.6.3
     @angular-devkit/build-angular : 0.803.29
     @angular-devkit/schematics    : 8.3.29
     @angular/cli                  : 8.3.29
     @ionic/angular-toolkit        : 2.3.3
  
  Cordova:
  
     Cordova CLI       : 9.0.0 (cordova-lib@9.0.1)
     Cordova Platforms : android 8.1.0
     Cordova Plugins   : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 4.2.1, (and 20 other plugins)
  
  Utility:
  
     cordova-res (update available: 0.15.3) : 0.14.0
     native-run                             : 1.3.0
  
  System:
  
     NodeJS : v10.24.0 (/usr/bin/node)
     npm    : 6.14.11
     OS     : Linux 5.4
  </code></pre>
  <p>Thank you</p>