taro 小程序 textarea 不能连续输入

import Taro from ‘@tarojs/taro‘
import { AtTextarea }  from ‘taro-ui‘
export default class Index extends Taro.Component {
constructor () {
super(...arguments)
this.state = {
value: ‘‘
}
}
handleChange (value) {
this.setState({
value
})
}
render () {
return (
<AtTextarea
value={this.state.value}
onChange={this.handleChange.bind(this)}
maxLength={200}
placeholder=‘你的问题是...‘
/>
    )
}
}