Issue title: Accordian template on veutify not showing up because of v-for loop on nuxt js 
 Issue body: I am trying to create a faq page on nuxt js.
The template below which I got from veautify does not show up on my localhost. I get these errors instead. It works if I replace v-for "(item,i) in 5" : key="i" as shown in the template source code but I want to pass a list of questions from object(listquestions)into the array from MapState.

[Vue warn]: The client-side rendered virtual DOM tree is not matching server-rendered content. This is likely caused by incorrect HTML markup, for example nesting block-level elements inside <p>, or missing <tbody>. Bailing hydration and performing full client-side render.
v-toolbar-logo> - did you register the component correctly? For recursive components, make sure to provide the "name" option.

found in

---> <Default> at layouts/default.vue
       <Root>
**faq.vue file**
```
<template>
    <v-expansion-panel>
        <v-expansion-panel-content v-for="quest in listquestions" :key="quest.id">
            <div slot="header"> Question </div>
            <v-card>
                <v-card-text class ="grey lighten-3">
                    This is a test answer.
                </v-card-text>
            </v-card>
        </v-expansion-panel-content>
    </v-expansion-panel>
</template>

<style>

</style>
<script>

import {mapState, mapGetters, mapActions} from 'vuex'

export default {
  computed: mapState({
      listquestions:'allQuestions'
      })
}
</script>`
```
```
**questions.js file**
export const state = () => ({
    list :['Question 1','Question 2','Question 3','Question 4','Question 5'],
    allQuestions: state => state.list 
       
})
``` 
Accordian template source code which I got from veautify.
```
https://vuetifyjs.com/components/expansion-panels#example-1
```

 Comments: 
 Comment 0: Because this bug report seems to be inactive for quite some time, I'll close it now. If you feel like it deserves some attention because it's not fixed, feel free to ping me and I'll reopen it.

 Comment 1: This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

{'source': 'GithubIssues', 'repo_name_with_owner': 'nuxt/nuxt.js', 'issue_id': 293825036, 'repo_stars': 43475.0}