扇形标签颜色及字体会发生改变echarts sunburst配置项内容和展示

当点击未显示标签的扇形区域, 再点击中心区域, 标签的颜色会发生改变, 字体样式也会发生变化

      var data = [{
    name: 'Grandpa',
    children: [{
        name: 'Uncle Leo',
        value: 15,
        children: [{
            name: 'Cousin Jack',
            value: 2
        }, {
            name: 'Cousin Mary',
            value: 5,
            children: [{
                name: 'Jackson',
                value: 2
            }]
        }, {
            name: 'Cousin Ben',
            value: 4
        }]
    }, {
        name: 'Father',
        value: 10,
        children: [{
            name: 'Me',
            value: 5
        }, {
            name: 'Brother Peter',
            value: 1
        }]
    }]
}, {
    name: 'Nancy',
    children: [{
        name: 'Uncle Nike',
        children: [{
            name: 'Cousin Betty',
            value: 1
        }, {
            name: 'Cousin Jenny',
            value: 2
        }]
    }]
}];

option = {
    series: {
        type: 'sunburst',
        // highlightPolicy: 'ancestor',
        data: data,
        radius: [0, '90%'],
        label: {
            rotate: 'radial',
            minAngle: 40
        }
    }
};