yAxis.axisLabel.rich.<user defined style name>.verticalAlign不生效echarts 折线配置项内容和展示

yAxis.axisLabel.rich.<user defined style name>.verticalAlign不生效

      option = {
    xAxis: {
        type: 'category',
        data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
    },
    yAxis: {
        type: 'value',
        axisLabel: {
            lineHeight: 30,
            formatter: function(value, index) {
                if (index === 0) {return `{top|${value}}`}
                return `{bottom|${value}}`
            },
            rich: {
                top: {
                    verticalAlign: 'top',
                    // lineHeight: 30,
                },
                bottom: {
                    verticalAlign: 'bottom',
                    // lineHeight: 30,
                }
            }
        },
    },
    series: [{
        data: [820, 932, 901, 934, 1290, 1330, 1320],
        type: 'line',
        smooth: true
    }]
};