Why doesn't v-model work with vuex + vuetify v-form?

Question

Vue.js

I watched about the validation from footifay

<v-text-field
                                   v-model="fields.currentPassword"
                />

But the form is always valid even when the field from the state is not valid according to the rules, and if you replace the component variable with the local data, it works. The state is updated in both cases with both local and vuex. So why doesn't it work?