title: Vuex(store js) doesn't update the computed property only if I refresh the page
body: <p>Hi I am making a get call in store js and I pass it  as computed property in Movie.vue, when I refresh the page I get the real value if I change the view or I go back to the index the value will not change will stay the same.Every time I need to refresh the page in order to access a new value from store js.</p>
  
  <pre><code>&lt;template&gt;
      &lt;div &gt;
      &lt;Navbar /&gt;
       &lt;v-parallax
          dark
          src="https://cdn.vuetifyjs.com/images/backgrounds/vbanner.jpg"
        &gt;
          &lt;v-layout
            align-center
            column
            justify-center
          &gt;
            &lt;h1 class="display-2 font-weight-thin mb-3"&gt;{{film_title}}&lt;/h1&gt;
            &lt;h4 class="subheading"&gt;{{film_tagline}}&lt;/h4&gt;
  
          &lt;/v-layout&gt;
  
        &lt;/v-parallax&gt;
        &lt;v-container fluid&gt;
          &lt;v-layout row&gt;
           &lt;v-flex xs10 sm6  md4 lg3 offset-sm1 style="position:absolute; top:350px;"&gt;
            &lt;v-card&gt;
              &lt;v-img
                :src="'https://image.tmdb.org/t/p/original' + film_poster_path"
                aspect-ratio=".75" style="background-image-width:300px;"
              &gt;&lt;/v-img&gt;
  
              &lt;v-card-title primary-title&gt;
                &lt;div&gt;
                  &lt;h5 xs12 sm6 &gt;
                        &lt;v-chip color="orange" text-color="white" v-if="film_genres_1"&gt;
                        {{film_genres_1}}
                        &lt;v-icon right&gt;star&lt;/v-icon&gt;
                    &lt;/v-chip&gt;
                    &lt;v-chip color="primary" text-color="white" v-if="film_genres_2"&gt;
                        {{film_genres_2}}      
                      &lt;v-icon right&gt;star&lt;/v-icon&gt;
                      &lt;/v-chip&gt;
                      &lt;v-chip color="green" text-color="white" v-if="film_genres_3"&gt;
                        {{film_genres_3}}      
                      &lt;v-icon right&gt;star&lt;/v-icon&gt;
                      &lt;/v-chip&gt;
                      &lt;v-chip color="red" text-color="white" v-if="film_genres_4"&gt;
                        {{film_genres_4}}      
                      &lt;v-icon right&gt;star&lt;/v-icon&gt;
                      &lt;/v-chip&gt;
                      &lt;v-chip label color="pink" text-color="white" v-if="film_production"&gt;
                          &lt;v-icon left&gt;label&lt;/v-icon&gt;Produce by: {{film_production}}
                      &lt;/v-chip&gt;
                      &lt;v-chip label color="secondary" text-color="white" v-if="film_release_date"&gt;
                          &lt;v-icon left&gt;label&lt;/v-icon&gt;Release date: {{film_release_date}}
                      &lt;/v-chip&gt;
                        &lt;v-chip color="primary" text-color="white"&gt;Run time: {{film_runtime}} minutes&lt;/v-chip&gt;
                  &lt;/h5&gt;
                &lt;/div&gt;
              &lt;/v-card-title&gt;
            &lt;/v-card&gt;
          &lt;/v-flex&gt;
          &lt;v-flex xs7 offset-xs5&gt;
          &lt;v-expansion-panel
            expand
          &gt;
            &lt;v-expansion-panel-content
              v-for="(item, i) in 1"
              :key="i"
            &gt;
              &lt;template v-slot:header&gt;
                &lt;div&gt;Overview&lt;/div&gt;
              &lt;/template&gt;
              &lt;v-card&gt;
                &lt;v-card-text class="grey lighten-3"&gt;{{film_overview}}&lt;/v-card-text&gt;
              &lt;/v-card&gt;
            &lt;/v-expansion-panel-content&gt;
          &lt;/v-expansion-panel&gt;
  
              &lt;vue-plyr&gt;
                &lt;div class="plyr__video-embed"  :key="$route.fullPath"&gt;
                  &lt;iframe
                    :src="'https://www.youtube.com/watch?v=' +video_key"
                    allowfullscreen allowtransparency allow="autoplay"&gt;
                  &lt;/iframe&gt;
                &lt;/div&gt;
              &lt;/vue-plyr&gt;
            &lt;/v-flex&gt;
         &lt;div class="loading" v-if="loading"&gt;&lt;fingerprint-spinner/&gt;&lt;/div&gt;
          &lt;/v-layout&gt;
        &lt;/v-container&gt;
      &lt;/div&gt;
      &lt;/template&gt;
      &lt;script&gt;
      import Navbar from '../components/Navbar'
      import axios from "axios"
  
  
      export default {
           components:{
              Navbar,
            },
  
            created() {
              this.$store.dispatch("fetchData");
             },
             computed:{
               video_key() {
                  return this.$store.state.video_key 
               }},
  
        data () {
          return {
            loading:true,
            componentKey: 0,
            movie_key:null,
            fun:true,
  
            film_poster_path:null,
            film_title:null,
            film_tagline:null,
            film_overview:null,
            film_genres:null,
            film_genres_1:null,
            film_genres_2:null,
            film_genres_3:null,
            film_genres_4:null,
            film_production:null,
            film_release_date:null,
            film_runtime:null,
            film_key:null,
            // video_key:null,
  
            m_id:this.$route.params.m_id    
            }
  
      },
      mounted()  {
        // axios
        //   .get(`https://api.themoviedb.org/3/movie/${this.m_id}/videos?api_key=&amp;language=en-US`)
        //     .then(response =&gt; (
        //       this.film_key=response.data.results[0].key
        //       ))
          axios
          .get(`https://api.themoviedb.org/3/movie/${this.m_id}?api_key=&amp;language=en-US`)
            .then(response =&gt; (
              this.loading = false,
              this.film_title=response.data.original_title,
              this.film_tagline=response.data.tagline,
              this.film_overview=response.data.overview,
              this.film_poster_path=response.data.poster_path,
              this.film_genres=response.data.genres,
              this.film_genres_1=response.data.genres[0].name,
              this.film_genres_2=response.data.genres[1].name,
              this.film_genres_3=response.data.genres[2].name,
              this.film_genres_4=response.data.genres[3].name,
              this.film_production=response.data.production_companies[0].name,
              this.film_release_date=response.data.release_date,
              this.film_runtime=response.data.runtime
              // this.test=response.data.results[0].key
              ))
  
  
        }
      }
      &lt;/script&gt;
  
      enter code here
  </code></pre>