折线图多种类型数据显示，使用了seriesField，动态变化中出现连线变乱。点击图例，单个类型显示时没问题。尝试过加type:undefined和type: 'cat'.未解决

* **G2Plot Version**: 2.3.21
* **Platform**: mac, Google Chrome(版本90.0.4430.212)
* **Mini Showcase(like screenshots)**: 数据格式[{time:,value:,type:}]
* **CodePen Link**:
*[{"time":"1622010371000","value":73,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010372000","value":76,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010373000","value":70,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010374000","value":71,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010375000","value":77,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010376000","value":70,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010377000","value":72,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010378000","value":70,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010379000","value":70,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010380000","value":77,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010381000","value":82,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010382000","value":76,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010383000","value":69,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010384000","value":70,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010385000","value":66,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010386000","value":73,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010387000","value":71,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010388000","value":74,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010389000","value":69,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010390000","value":68,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010391000","value":78,"type":"getReturnBeanSwatGoodsList"},{"time":"1622010361000","value":77,"type":"Test.test"},{"time":"1622010362000","value":75,"type":"Test.test"},{"time":"1622010363000","value":68,"type":"Test.test"},{"time":"1622010364000","value":73,"type":"Test.test"},{"time":"1622010365000","value":80,"type":"Test.test"},{"time":"1622010366000","value":74,"type":"Test.test"},{"time":"1622010367000","value":71,"type":"Test.test"},{"time":"1622010368000","value":75,"type":"Test.test"},{"time":"1622010369000","value":65,"type":"Test.test"},{"time":"1622010370000","value":67,"type":"Test.test"},{"time":"1622010371000","value":73,"type":"Test.test"},{"time":"1622010372000","value":76,"type":"Test.test"},{"time":"1622010373000","value":70,"type":"Test.test"},{"time":"1622010374000","value":71,"type":"Test.test"},{"time":"1622010375000","value":77,"type":"Test.test"},{"time":"1622010376000","value":70,"type":"Test.test"},{"time":"1622010377000","value":72,"type":"Test.test"},{"time":"1622010378000","value":70,"type":"Test.test"},{"time":"1622010379000","value":70,"type":"Test.test"},{"time":"1622010380000","value":77,"type":"Test.test"},{"time":"1622010381000","value":82,"type":"Test.test"},{"time":"1622010382000","value":76,"type":"Test.test"},{"time":"1622010383000","value":69,"type":"Test.test"},{"time":"1622010384000","value":70,"type":"Test.test"},{"time":"1622010385000","value":66,"type":"Test.test"},{"time":"1622010386000","value":73,"type":"Test.test"},{"time":"1622010387000","value":71,"type":"Test.test"},{"time":"1622010388000","value":74,"type":"Test.test"},{"time":"1622010389000","value":69,"type":"Test.test"},{"time":"1622010390000","value":69,"type":"Test.test"},{"time":"1622010391000","value":78,"type":"Test.test"}]


Start by reproducing the reported dynamic multi-type line chart behavior in G2Plot 2.3.21 using the provided data and seriesField configuration. The report names no source file, test, or CodePen reproduction, so completion would require isolating the cause and adding a verified fix or regression test for stable connections when legend selections change.

Written by the indexing model from the issue text.