【报Bug】textarea 真机测试双向绑定失效

示例代码：

            <view class="evaluate-con" v-for="(itemall,idx) in  orderCon" :key='idx' >  
                <view class="goodsStyle acea-row row-between" >  
                    <view class="pictrue">  
                        <image :src="itemall.productInfo.image" class="image" />  
                    </view>  
                    <view class="text acea-row row-between">  
                        <view class="name line2 font-color-black">{{itemall.productInfo.storeName}}</view>  
                        <!-- <view class="money">  
                            <view>￥{{ orderCon.productInfo.price }}</view>  
                            <view class="num">x{{ orderCon.cartNum }}</view>  
                        </view> -->  
                    </view>  
                </view>  

                <starall name='描述相符' v-model="submitdata.productEvaluateParams[idx].productScore"/>  
                <view class="score">  
                    <view class="textarea">  
                        <textarea   
                            :data-idx = 'idx'  
                            @input='changesall($event,idx)'  
                         placeholder="从多个角度评价商品，可以帮助更多想买的人"   
                         :maxlength="300"></textarea>  
                        <view class="list acea-row row-middle">  
                            <scroll-view scroll-x="true" class="scrollpictrue">  
                            <view class="pictrue uploadBnt acea-row row-center-wrapper row-column" @click.stop="chooseImageall(idx)">  
                                <text class="iconfont icon-icon25201"></text>  
                                <view>发布买家秀</view>  
                            </view>  
                                <view class="pictrue"  
                                v-for="(item, uploadPicturesIndex) in submitdata.productEvaluateParams[idx]['pics']"   
                                :key="uploadPicturesIndex">  
                                    <image :src="item" />  
                                    <text class="iconfont icon-guanbi1 font-color-brown" @click.stop="delall(uploadPicturesIndex,idx)"></text>  
                                </view>       
                            </scroll-view>  
                        </view>  
                    </view>  
                </view>  

            </view>  
            <view class="starall">  
                <starall name='服务态度'  v-model="submitdata.serviceScore"/>  
            </view>  
            <view class="evaluate-btnview"></view>  
            <view class="evaluate-btn">  
                <view class="evaluateBnt bg-color-brown" @click="submit">发布</view>  
            </view>  
    </view>  

操作步骤：

            <view class="evaluate-con" v-for="(itemall,idx) in  orderCon" :key='idx' >  
                <view class="goodsStyle acea-row row-between" >  
                    <view class="pictrue">  
                        <image :src="itemall.productInfo.image" class="image" />  
                    </view>  
                    <view class="text acea-row row-between">  
                        <view class="name line2 font-color-black">{{itemall.productInfo.storeName}}</view>  
                        <!-- <view class="money">  
                            <view>￥{{ orderCon.productInfo.price }}</view>  
                            <view class="num">x{{ orderCon.cartNum }}</view>  
                        </view> -->  
                    </view>  
                </view>  

                <starall name='描述相符' v-model="submitdata.productEvaluateParams[idx].productScore"/>  
                <view class="score">  
                    <view class="textarea">  
                        <textarea   
                            :data-idx = 'idx'  
                            @input='changesall($event,idx)'  
                         placeholder="从多个角度评价商品，可以帮助更多想买的人"   
                         :maxlength="300"></textarea>  
                        <view class="list acea-row row-middle">  
                            <scroll-view scroll-x="true" class="scrollpictrue">  
                            <view class="pictrue uploadBnt acea-row row-center-wrapper row-column" @click.stop="chooseImageall(idx)">  
                                <text class="iconfont icon-icon25201"></text>  
                                <view>发布买家秀</view>  
                            </view>  
                                <view class="pictrue"  
                                v-for="(item, uploadPicturesIndex) in submitdata.productEvaluateParams[idx]['pics']"   
                                :key="uploadPicturesIndex">  
                                    <image :src="item" />  
                                    <text class="iconfont icon-guanbi1 font-color-brown" @click.stop="delall(uploadPicturesIndex,idx)"></text>  
                                </view>       
                            </scroll-view>  
                        </view>  
                    </view>  
                </view>  

            </view>  
            <view class="starall">  
                <starall name='服务态度'  v-model="submitdata.serviceScore"/>  
            </view>  
            <view class="evaluate-btnview"></view>  
            <view class="evaluate-btn">  
                <view class="evaluateBnt bg-color-brown" @click="submit">发布</view>  
            </view>  
    </view>

预期结果：

双向绑定有值

实际结果：

双向绑定无值