title: Snack bar not showing on button press
body: <p>I am using a vuetify snack bar to show error msgs when a user clicks a button. When the button is clicked the signup() is called and checks if a gender is selected by the radio buttons. If no gender is selected this.gender is 0 and should show a snack bar. I find that snackbar does not always show. Not sure what the problem is. Any help? </p>
  
  <pre><code>    &lt;v-radio-group v-model="gender" row&gt;
    &lt;v-radio name="type"  label="male" value="1" &gt;&lt;/v-radio&gt;
    &lt;v-radio name="type"  label="female" value="2"&gt;&lt;/v-radio&gt;
  &lt;/v-radio-group&gt;
  
  
      &lt;v-snackbar
        v-model="warningSnackbar"
      &gt;
        Please fill all elements in form!
        &lt;v-btn
          color="pink"
          text
          @click="warningSnackbar = false"
        &gt;
          Close
        &lt;/v-btn&gt;
      &lt;/v-snackbar&gt;
  
  
  
        data(){
    return{
     warningSnackbar:false,
     gender:0
  
  
     }}
  
  
  
       signup(){
  
   if(this.gender === 0){
  
         this.warningSnackbar= true
  
        }
  
       }
  </code></pre>