【报Bug】unicloud-db组件嵌套，获取不到里层的db

示例代码：

<unicloud-db ref="udb" v-slot:default="{data, loading, error, options}" collection="pay"  
            :where="`pay_date > ${selectDateStart} && pay_date < ${selectDateEnd} && is_remove == 0`" groupby="pay_date"  
            group-field="sum(pay_num) as payDaySum" orderby="pay_date desc" loadtime="manual">  
            <!-- 循环日期 -->  
            <view class="detail-list" v-for="(item,index) in data" :key="index">  
                <view class="detail-date flex align-center">  
                    <uni-dateformat :date="item.pay_date" format="yyyy-MM-dd"></uni-dateformat>  
                    <view class="body-padding">(¥{{item.payDaySum / 100}})</view>  
                </view>  
                <view class="day-pay bg-white main-margin-top mian-box-shadow main-border-radius">  
                    <unicloud-db ref="udb1" v-slot:default="{data, loading, error, options}" collection="pay, pay-type"  
                        :where="`pay_date == ${item.pay_date} && openid == '${openid}' && is_remove == 0`" orderby="pay_date"  
                        loadtime="manual">  
                        <!-- 每日消费详细 -->  
                        <view class="day-pay-detail flex justify-between main-padding-top-down body-padding main-border-bottom"  
                            v-for="(item1,index) in data" :key="index">  
                            <text>{{item1.pay_type[0].type_name}}</text><text>¥{{item1.pay_num / 100}}</text>  
                        </view>  
                        <!-- 每日消费明细结束 -->  
                    </unicloud-db>  

onReady() {  
            this.$refs.udb.loadData({clear: true})  
            this.$refs.udb1.loadData({clear: true})  

            console.log('udb - ' + this.$refs.udb)  
            console.log(this.$refs.udb1)  
        }  

// 报错： TypeError: Cannot convert object to primitive value

操作步骤：

<unicloud-db ref="udb" v-slot:default="{data, loading, error, options}" collection="pay"  
            :where="`pay_date > ${selectDateStart} && pay_date < ${selectDateEnd} && is_remove == 0`" groupby="pay_date"  
            group-field="sum(pay_num) as payDaySum" orderby="pay_date desc" loadtime="manual">  
            <!-- 循环日期 -->  
            <view class="detail-list" v-for="(item,index) in data" :key="index">  
                <view class="detail-date flex align-center">  
                    <uni-dateformat :date="item.pay_date" format="yyyy-MM-dd"></uni-dateformat>  
                    <view class="body-padding">(¥{{item.payDaySum / 100}})</view>  
                </view>  
                <view class="day-pay bg-white main-margin-top mian-box-shadow main-border-radius">  
                    <unicloud-db ref="udb1" v-slot:default="{data, loading, error, options}" collection="pay, pay-type"  
                        :where="`pay_date == ${item.pay_date} && openid == '${openid}' && is_remove == 0`" orderby="pay_date"  
                        loadtime="manual">  
                        <!-- 每日消费详细 -->  
                        <view class="day-pay-detail flex justify-between main-padding-top-down body-padding main-border-bottom"  
                            v-for="(item1,index) in data" :key="index">  
                            <text>{{item1.pay_type[0].type_name}}</text><text>¥{{item1.pay_num / 100}}</text>  
                        </view>  
                        <!-- 每日消费明细结束 -->  
                    </unicloud-db>  

onReady() {  
            this.$refs.udb.loadData({clear: true})  
            this.$refs.udb1.loadData({clear: true})  

            console.log('udb - ' + this.$refs.udb)  
            console.log(this.$refs.udb1)  
        }  

// 报错： TypeError: Cannot convert object to primitive value  

预期结果：

正常更新

实际结果：

里层不能更新