提示:“选择”下拉列表会在更改值时清除其他输入

My dropdown, using the standard select element, is located at the bottom of the form and the issue is that I start typing into the other inputs (street, apartment, etc). When I go to change the state from the dropdown, the other inputs are cleared and I can't see to tell why.

<div class="street-address">
    <input :value="customer.street_address" ref="streetAddress" autocomplete="address-line1" class="default-input">
        <div v-if="this.showSecondAddressLine === false"
             v-on:click="toggleSecondAddressLine()"
             class="plus">
                +
        </div>
    </input>
    <span class="input-small">Street Address</span>
</div>
<div v-if="this.showSecondAddressLine === true" class="street-address-line-2">
    <input :value="customer.apartment" ref="apartment" class="default-input" autocomplete="address-line2">
        <div v-if="this.showSecondAddressLine === true"
             v-on:click="toggleSecondAddressLine()"
             class="plus">
                x
        </div>
    </input>
    <span class="input-small">Street Address Line 2</span>
</div>
<div class="city">
    <input :value="customer.city" ref="city" autocomplete="address-level2" class="default-input"></input>
    <span class="input-small">City</span>
</div>
<div>
    <select name="state" autocomplete="address-level1" v-model="optionDropdown">
        <option v-for="x in optionsReturned" :value="x.value">
          {{ x.text }}
        </option>
    </select>
</div>