high-dd

[Bug] 热力图坐标轴添加tooltip，触发tooltip时会产生闪动

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### Version 5.5.1 ### Link to Minimal Reproduction https://codepen.io/high-dd/pen/Poraeqa ### Steps to Reproduce **[官方热力图example](https://echarts.apache.org/examples/zh/editor.html?c=heatmap-cartesian)基础上，使用chart.setOption({})，分别给x轴和y轴文字添加tooltip。** **具体代码如下：** `var dom = document.getElementById('chart-container'); var myChart = echarts.init(dom, null, { renderer: 'canvas', useDirtyRect: false });...