chart line don't render when data is exist null

[speanut-land]

• I have searched the issues of this repository and believe that this is not a duplicate.

Reproduction link

https://codepen.io/speanut-land/pen/vYmvjqG

Steps to reproduce

Wait for the timer to change the data to Null, then need to manually hover, the chart will be re-rendered,

Environment	Info
g2	4.1.23
System	-
Browser	-

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1.Note that the chart animation needs to be turned off, otherwise, re-render, no expected effect
2.When the data is null, expect to behave as a breakpoint and chart re-render

[hustcc]

[speanut-land]

设置了connectNulls并不能解决问题，example中数据通过setTimeout修改了俩次，"不包含Null" - "包含Null" - "不包含Null"，在最后一次的"不包含Null"图表没有渲染出来，debug底层g-Canvas查看是数据变成NaN导致局部渲染出现了问题