多Y轴柱状图显示问题echarts rgba(0,0,0,0)配置项内容和展示

使用多个Y轴时，若设置某个Y轴起始坐标不为0，则柱状图显示时会出现BUG，翻文档及各种度娘无果，来此求教怎么解决，请指教

      option = {
    title: {
        text: '多Y轴柱状图显示问题'
    },
    tooltip: {
        trigger: 'axis',
        axisPointer: {
            type: 'cross'
        }
    },
    xAxis: {
        data: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
    },
    yAxis: [{
            type: 'value',
            name: '频率',
            min: 0,
            max: 200,
            position: 'left',
            offset: 50,
            maxInterval: 20,
            axisLabel: {
                formatter: '{value} 次/分'
            }
        },
        {
            type: 'value',
            name: '温度',
            min: 30,
            max: 43,
            position: 'left',
            maxInterval: 1,
            axisLabel: {
                formatter: '{value}  °C'
            }
        },
    ],
    series: [{
        stack: "体温显示修复",
        type: "bar",
        yAxisIndex: 1,
        data: [30, 30, 30, 30, 30, 30],
        itemStyle: {
            normal: {
                barBorderColor: 'rgba(0,0,0,0)',
                color: 'rgba(0,0,0,0)'
            },
            emphasis: {
                barBorderColor: 'rgba(0,0,0,0)',
                color: 'rgba(0,0,0,0)'
            }
        },
    }, {
        name: '体温',
        stack: "体温显示修复",
        type: 'bar',
        yAxisIndex: 1,
        data: [4, 5, 10, 9, 7],

    }, {
        name: '脉搏',
        type: 'bar',
        data: [82, 90, 99, 100, 85]
    }]
};