After the a-table component sets the sortDirectionsn property, the up and down arrows in the column are not displayed

[linziguan]

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

Version

3.2.2

Environment

chrome86、vue3.2

Reproduction link

Steps to reproduce

设置sortDirections: ['asc', 'desc']

What is expected?

排序箭头可以正常显示

What is actually happening?

排序箭头没有正常显示

[linziguan]

我用错了。

[github-actions]

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