The legend color was wrong when switching mulitple chart instances in IE11 and Edge

[Alizwell]

Version

4.2.1

Steps to reproduce

1. There are 6 charts, and we can switch those charts arbitray in a selection
2. Each chart have the same legend and color config
3. Switch thos charts more than 8 times

What is expected?

Every time the legend color should be the same

What is actually happening?

The legend color will be wrong after switch those charts many y times.

---

1. This bug can reproduce definitely in IE11 and Edge, but can't reproduce in Chrome(Version 74.0.3729.131)
2. I loged the option, found that the option was the same but the render of legend was different

[echarts-bot]

Hi! We've received your issue and please be patient to get responded. 🎉
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In the meanwhile, please make sure that you have posted enough image to demo your request. You may also check out the API and chart option to get the answer.

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[Ovilia]

Can you provide a minimum demo to reproduce this problem? https://jsfiddle.net/ovilia/yh76w9Lt/

[Alizwell]

OK, I will provide a demo in the later time.

[Alizwell]

You can refer to this link https://codesandbox.io/s/wonderful-mayer-16jlx
Notice, this bug will occur in Edge and IE 11. In chrome the legend color is correct.And you'd better to switch the selection more than 7 time to capture this bug.Thanks.

[Alizwell]

https://codesandbox.io/s/great-shannon-vk48p?fontsize=14
Sorry, the previous link was wrong, you can refer to this new link.

[binarykitchen]

We have this problem too and bumping to latest echarts version 4.4.0 does't make a difference. I wonder if you are polyfilling collection functions to ensure IE11 compatibility?