[GitHub] [incubator-echarts] chenlijun99 opened a new issue #13228: When the line chart data is null, the line sometimes does not break.

[GitBox <gi...@apache.org>]

chenlijun99 opened a new issue #13228:
URL: https://github.com/apache/incubator-echarts/issues/13228


   ### Version
   4.9.0
   
   ### Reproduction link
   [https://gallery.echartsjs.com/editor.html?c=xcuRsPaAOP&v](https://gallery.echartsjs.com/editor.html?c=xcuRsPaAOP&v)
   
   ### Steps to reproduce
   Try to tweak the value of the constant `INTERVAL` at the 1st line.
   The value I've written should already show the issue: even though there is a null data item inserted, the first and second data ranges are still connected.
   
   If you try to increase the value of `INTERVAL`, which means that the data density becomes lower, this issue disappears. 
   
   ### What is expected?
   A null data item should break the line no matter the data density
   
   ### What is actually happening?
   When data density is high, a line is not broken even though a null data item has been inserted.
   
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   <!-- This issue is in English. DO NOT REMOVE -->


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