Modal cannot be vertically centered when footer is set to null

[meesii]

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

Version

3.0.0-beta.7

Environment

3.0.0-beta.7

Reproduction link

Steps to reproduce

modal已经设置centered，但是不能垂直居中，刚好差一个footer的高度

What is expected?

垂直居中

What is actually happening?

modal已经设置centered，但是不能垂直居中，刚好差一个footer的高度

[tangjinzhou]

[meesii]

你截图看一下像素，上边107px，下边130px。
我把页面缩小就很明显了，截图看下能不能显示

[meesii]

额，没问题了，codesandbox没有升级到bate7

[github-actions]

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