Table组件树形数据排序出错

[candy-Tong]

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

Version

1.6.0

Environment

windows10,google chrome 79.0.3945.130,vue 2.6.10

Reproduction link

Steps to reproduce

在Table组件中使用属性数据，然后排序

What is expected?

排序成功

What is actually happening?

报错：You may have an infinite update loop in a component render function。

[github-actions]

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