'v-model in works in v-text-area but not in v-autocomplete

If i change the component from <v-autocomplete> to <v-text-field> the binding works, but if i use the autocomplete component, the 'queryString' data always stays null. Am i missing something or could it be a bug?

<v-autocomplete
  v-model="queryString"
  outlined
  dense
  single-line
  solo-inverted
  append-icon="mdi-magnify"
  @keyup="search"
></v-autocomplete> 


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