SDK1.4.2 微信版本6.5.10 系统android map在真机上运行，点击marker时弹出cover-view，显示速度有点慢，而且有时会显示不出来
上代码：
.wxml
<view class="map_container">
<map class="map" id="map" longitude="{{longitude}}" latitude="{{latitude}}" scale="14" show-location="true" markers="{{markers}}" bindmarkertap="makertap" polyline="{{polyline}}" bindtap="maptap">
<cover-view class="car_info" hidden="{{carInfohidden}}">
<cover-view class="basicInfo">
<cover-view style=" flex-direction:column;">
<cover-view class="driverNameCss">{{placeData.driverName}}</cover-view>
<cover-view class="carNumberCss">{{placeData.carNumber}}</cover-view>
<cover-view class="brandNameCss">{{placeData.brandName}}</cover-view>
</cover-view>
<cover-image class="carImgCss" src="../../img/vehicle_detail.png"> </cover-image>
<cover-image class="closeImageCss" src="../../img/new_close_gray.png" bindtap="closeCarInfo"> </cover-image>
</cover-view>
<cover-view class="stateInfo">
<cover-view class="waringInfo">
<cover-view class="carState" style="display: flex;"> <cover-view class="carTextFlagCss">当前状态: </cover-view><cover-view class="carTextCss">{{placeData.state}}</cover-view> </cover-view>
<cover-view class="carStateTime" style="display: flex;"><cover-view class="carTextFlagCss">上报时间: </cover-view><cover-view class="carTextCss">{{placeData.sTime}}</cover-view> </cover-view>
</cover-view>
<cover-image class="lineImage" src="../../img/vertical_line.png"> </cover-image>
<cover-image class="lineImage2" src="../../img/vertical_line.png"> </cover-image>
<cover-view class="GPSInfo">
<cover-view class = "subGPSInfo">
<cover-view class = "itemCss">
<cover-view class="carTextFlagCss">纬度</cover-view>
<cover-view class="carTextCss">{{placeData.latitude}}</cover-view>
</cover-view>
<cover-view class = "itemCss">
<cover-view class="carTextFlagCss">经度</cover-view>
<cover-view class="carTextCss">{{placeData.longitude}}</cover-view>
</cover-view>
<cover-view class = "itemCss">
<cover-view class="carTextFlagCss">速度</cover-view>
<cover-view class="carTextCss">{{placeData.speed}}
</cover-view>
</cover-view>
</cover-view>
<cover-view class = "subGPSInfo">
<cover-view class = "itemCss">
<cover-view class="carTextFlagCss">方向</cover-view>
<cover-view class="carTextCss">{{placeData.heading}}</cover-view>
</cover-view>
<cover-view class = "itemCss">
<cover-view class="carTextFlagCss">海拔</cover-view>
<cover-view class="carTextCss">{{placeData.altitude}}</cover-view>
</cover-view>
<cover-view class = "itemCss">
<cover-view class="carTextFlagCss">GPS时间</cover-view>
<cover-view class="carTextCss">{{placeData.pTime}}</cover-view>
</cover-view>
</cover-view>
</cover-view>
</cover-view>
<cover-view class="otherInfo">
<cover-view class="basicOtherInfo">
<cover-view style="display: flex;"><cover-view class="carTextFlagCss">领航员 </cover-view><cover-view class="carTextCss">{{placeData.pilotName}}</cover-view> </cover-view>
<cover-view style="display: flex;"><cover-view class="carTextFlagCss">俱乐部 </cover-view><cover-view class="carTextCss">{{placeData.clubName}}</cover-view> </cover-view>
<cover-view style="display: flex;"><cover-view class="carTextFlagCss">组别 </cover-view><cover-view class="carTextCss">{{placeData.groupName}}</cover-view> </cover-view>
</cover-view>
<cover-image class="historyTraceCss" src="../../img/history_btn.png" bindtap="showHistoryTrace"> </cover-image>
</cover-view>
</cover-view>
</map>
</view>
<audio src="{{src}}" id="myAudio" ></audio>
.wxss
.map_container{
height: 100vh;
width: 100%;
}
.map {
height: 100%;
width: 100%;
}
.car_info {
flex-direction: column;
align-items: center;
}
.basicInfo{
width: 100%;
height: 175rpx;
background-color:#EBF0EB;
font-size:30rpx;
font-family:"楷体";
display: flex;
flex-direction:row;
}
.driverNameCss{
margin-top: 35rpx;
margin-left: 40rpx;
color: green;
}
.carNumberCss{
margin-left: 40rpx;
}
.brandNameCss{
margin-left: 40rpx;
}
.carImgCss{
margin-top: 70rpx;
margin-left: 220rpx;
width: 100rpx;
height: 100rpx;
}
.closeImageCss{
margin-top: 35rpx;
margin-left: 220rpx;
width: 50rpx;
height: 50rpx;
}
.stateInfo{
width: 100%;
height: 300rpx;
background-color:#5A6A8A;
font-size:30rpx;
font-family:"楷体";
flex-direction:column;
}
.waringInfo{
margin-top: 30rpx;
margin-left: 270rpx;
width: 100%;
height: 100rpx;
float: center;
flex-direction:column;
}
.GPSInfo{
top: 120rpx;
margin-left: 40rpx;
width: 100%;
height: 200rpx;
float: center;
flex-direction:column;
}
.subGPSInfo{
width:100%;
height: 80rpx;
display: flex;
}
.carTextFlagCss{
color: #aaaabe;
}
.carTextCss{
color: #ffffff;
}
.lineImage{
top: 102rpx;
margin-left: 20rpx;
width: 700rpx;
height: 3rpx;
float: left;
}
.lineImage2{
top: 195rpx;
margin-left: 20rpx;
width: 700rpx;
height: 3rpx;
float: left;
}
.itemCss{
width: 295rpx;
flex-direction:column;
}
.otherInfo{
width: 100%;
height: 280rpx;
background-color:#475575;
font-family:"楷体";
margin-left: 1rpx;
}
.basicOtherInfo{
margin-top: 20rpx;
margin-left: 300rpx;
width: 100%;
height: 100%;
float: center;
flex-direction:row;
font-size:25rpx;
}
.historyTraceCss{
margin-top: 10rpx;
margin-left: 150rpx;
width: 60%;
height: 80rpx;
float: center;
}
