【报Bug】uni.createMapContext("map", this).getCenterLocation( ) 编译到支付宝小程序 真机调试下报错

示例代码：

<template>  
    <view class="content">  
        <map id="map" class="map" :latitude="latitude" :longitude="longitude"></map>  
        <button @click="click">点击</button>  
    </view>  
</template>  
<style scoped lang="scss">  
    #map {  
        width: 300px;  
        height: 300px;  
    }  
</style>  
<script>  
    export default {  
        data() {  
            return {  
                latitude: 23.099994,  
                longitude: 113.324520,  
                _mapContext: null  
            }  
        },  
        methods: {  
            click() {  
                this._mapContext.getCenterLocation({  
                    success: (res) => {  
                        console.log(res.longitude);  
                        console.log(res.latitude);  
                        console.log(res.scale);  
                    },  
                });  
            }  
        },  
        onReady() {  
            this._mapContext = uni.createMapContext("map", this)  
        }  
    }  
</script>  

操作步骤：

上面代码所示， 编译到支付宝小程序，使用真机调试就会报错

预期结果：

正常运行

实际结果：

报错vendor.js:4750 [Vue warn]: Property or method "toJSON" is not defined on the instance but referenced during render. Make sure that this property is reactive, either in the data option, or for class-based components, by initializing the property. See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.

(found in pages/index/index.vue)