Only Icon's Button cannot be displayed normally in small size block

[lizhancheng]

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

Version

3.0.0-beta.8

Environment

chrome98

Reproduction link

Steps to reproduce

如页面元素所示

What is expected?

仅带icon的small size按钮能block显示

What is actually happening?

仅带icon的small size按钮设置了block，但没能block显示

[github-actions]

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