mam-ijinus opened a new issue #13433:
URL: https://github.com/apache/incubator-echarts/issues/13433
### Version
4.9.0
### Steps to reproduce
1. open open
https://echarts.apache.org/examples/en/editor.html?c=line-sections
2. insert "itemStyle: { color: '#5e5e5e5e' }," to line 64
3. RUN
4. pass the mouse over the grey mark area
### What is expected?
the color is changing et only one mouse over occur and not mouseout
### What is actually happening?
the color blinking and there is multiple mouseover/mouseout
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