如何解决echarts双x轴第二个label不显示的问题？

xaxis: [{
    name:'1',
    min: starttime,
    scale: true,
    axisline: {
        show: true,
        linestyle: {
          color: colors[2]
        }
      },
    axislabel: {
      backgroundcolor:'red',
        formatter: '{value} ml'
      }
  },{
    name:'2',
    axisline: {
        show: true,
        linestyle: {
          color: colors[2]
        }
      },
    min: starttime,
    scale: true,
    axislabel: {
      backgroundcolor:'red',
      inside:true,
      show:true,
      hideoverlap:true,
      // formatter:  '111ml'
      }
  },],

series: [
    {
      type: 'custom',
      renderItem: renderItem,
      itemStyle: {
        opacity: 0.8
      },
      encode: {
        x: [1, 2],
        y: 0
      },
      data: data
    },
    {
      type: 'custom',
      renderItem: renderItem,
      xAxisIndex: 1,
      itemStyle: {
        opacity: 0.8
      },
      encode: {
        x: [1, 2],
        y: 0
      },
      data: data
    }
  ]