[Bug] 热力图Y轴渲染错误

[MIEnchating]

Version

5.6.0

Link to Minimal Reproduction

No response

Steps to Reproduce

export const getHeatOptions = (): E.EChartsOption => {
    return {
        tooltip: {
            position: 'top',
        },
        grid: {
            top: "1%",
            bottom: "10%",
            left: "1%",
            right: "1%",
            containLabel: true
        },
        xAxis: {
            type: 'category',
            data: hours as any,
            axisTick: {
                lineStyle: {
                    color: '#fff'
                }
            },
            axisLabel: {
                color: '#fff',
            },
            splitArea: {
                show: true,
                areaStyle: {
                    color: ['rgba(44,60,77,.8)', 'rgba(35,47,68,.7)']
                }
            }
        },
        yAxis: {
            type: 'category',
            data: [],
            axisTick: {
                show: true,
                lineStyle: {
                    color: '#fff'
                }
            },
            axisLabel: {
                color: '#fff'
            },
            splitArea: {
                show: true,
                areaStyle: {
                    color: ['rgba(44,60,77,.8)', 'rgba(35,47,68,.7)']
                }
            }
        },
        visualMap: {
            min: 0,
            max: 3600,
            calculable: true,
            orient: 'horizontal',
            left: 'center',
            textStyle: {
                color: '#fff'
            },
            inRange: {
                color: ['#313695', '#4575b4', '#74add1', '#abd9e9', '#e0f3f8', '#ffffbf', '#fee090', '#fdae61', '#f46d43', '#d73027', '#a50026']
            }
        },
        series: {
            type: 'heatmap',
            data: [],
            label: {
                show: true
            },
            emphasis: {
                itemStyle: {
                    shadowBlur: 10,
                    shadowColor: 'rgba(0, 0, 0, 0.5)'
                }
            }
        }
    }
}

Current Behavior

左上角渲染错误

排除发现去的Y轴配置项splitArea的显示也可以正常显示，或者数据项在某些情况下也正常。如图：

Expected Behavior

正常渲染

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

No response

[echarts-bot]

@MIEnchating It seems you are not using English, I've helped translate the content automatically. To make your issue understood by more people and get helped, we'd like to suggest using English next time. 🤗

TRANSLATED

TITLE

[Bug] Heatmap Y-axis rendering error