F7Vue: Smart Select Not Auto Update

Questions
1

I’m wondering why smart select with “multiple” attribute can auto update (out of the box) the displayed value after selecting options but not the “non multiple” which I have to create my own function.

This one need function:

<f7-list-item smart-select smart-select-back-on-select id="account">
	<f7-label>Account</f7-label>
	<f7-input type="select" @change="$nextTick(function(){ $('#account .item-after').text($('#account select').val()) })">
		<option v-for="item in account" :value="item">{{item}}</option>
	</f7-input>
</f7-list-item>

This one working out of the box:

<f7-list-item smart-select id="category">
	<f7-label>Category</f7-label>
	<f7-input type="select" multiple="multiple">
		<option v-for="item in category" :value="item">{{item}}</option>
	</f7-input>
</f7-list-item>