【报Bug】安卓h5页面上video层级的问题

示例代码：

<template>  
    <view class="page">  
        <video class="video" id="demoVideo" :controls="false" :enable-progress-gesture="false" :show-center-play-btn="disable" src="https://img.cdn.aliyun.dcloud.net.cn/guide/uniapp/%E7%AC%AC1%E8%AE%B2%EF%BC%88uni-app%E4%BA%A7%E5%93%81%E4%BB%8B%E7%BB%8D%EF%BC%89-%20DCloud%E5%AE%98%E6%96%B9%E8%A7%86%E9%A2%91%E6%95%99%E7%A8%8B@20181126-lite.m4v">  
            <cover-view class="controls-title">简单的自定义 controls</cover-view>  
            <cover-image class="controls-play img" @click="play" src="/static/play.png"></cover-image>  
            <cover-image class="controls-pause img" @click="pause" src="/static/pause.png"></cover-image>  
        </video>  
    </view>  
</template>  
<script>  
    export default {  
        data() {  
            return {}  
        },  
        mounted() {  
            this.videoCtx = uni.createVideoContext('demoVideo')  
        },  
        methods: {  
            play(event) {  
                this.videoCtx.play();  
                uni.showToast({  
                    title: '开始播放',  
                    icon: 'none'  
                });  
            },  
            pause(event) {  
                this.videoCtx.pause();  
                uni.showToast({  
                    title: '暂停播放',  
                    icon: 'none'  
                });  
            }  
        }  
    }  
</script>  
<style>  
    .page {  
        display: flex;  
        justify-content: center;  
    }  

    .video {  
        position: relative;  
    }  

    cover-view,  
    cover-image {  
        display: inline-block;  
    }  

    .img {  
        position: absolute;  
        width: 100rpx;  
        height: 100rpx;  
        top: 50%;  
        margin-top: -50rpx;  
    }  

    .controls-play {  
        left: 50rpx;  
    }  

    .controls-pause {  
        right: 50rpx;  
    }  

    .controls-title {  
        width: 100%;  
        text-align: center;  
        color: #FFFFFF;  
    }  
</style>

操作步骤：

在安卓机上的微信浏览器上打开该h5页面，并点击播放视频，看video上面的图层能否正常显示

预期结果：

视频正常播放，视频上的图层能正常显示

实际结果：

视频正常播放，视频上的图层无法显示，或者被视频遮挡住了