v-autocomplete not works with custom search (for fetch from database, f.e.) about vuetify-form-base HOT 2 OPEN

<!-- DEFAULT all other Types -> typeToComponent -->
<div
  :is="mapTypeToComponent(obj.schema.type)"
  v-else
  v-bind="bindSchema(obj)"
  :type="checkExtensionType(obj)"                  
  :value="setValue(obj)"
  :obj="obj"
  :search-input.sync="obj.schema.searchInput"
  ...

let autocomplete = null
let combobox = null

export default {
  components: { VFormBase },
  data () {
    return {
      myModel: {
        combobox: null,
        autocomplete: null
      },
      mySchema: { 
        combobox: { 
          type:'combobox', 
          items: this.items,
          cacheItems:true,
          searchInput: '',
        },       
        autocomplete: { 
          type:'autocomplete', 
          items: this.items,
          cacheItems:true,
          searchInput: '',
        }         
      },
      states: [
          'Alabama',
          'Alaska',
         // ...
          'Wyoming',
        ]      
    }
  },
  watch: {
    mySchema: {
      deep: true,
      async handler(val) {
        if (val.autocomplete.searchInput !== autocomplete) {
          val.autocomplete.items = await this.fetch(this.states.filter( i => i.includes(val.autocomplete.searchInput)));
          autocomplete = val.autocomplete.searchInput
        } 

        if (val.combobox.searchInput !== combobox) {
          val.combobox.items = await this.fetch(this.states.filter( i => i.includes(val.combobox.searchInput)));
          combobox = val.combobox.searchInput
        } 
      }
    }
  },
  methods: {
    fetch(obj) { 
      return new Promise( (resolve, reject) => setTimeout(() => resolve(obj), 500) )
    }
  }