页面/表单页/高级表单 /新增成员：没有立即显示， 拖动窗口后才显示

[M69W]

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Describe the bug

open url: https://vvbin.cn/next/#/page-demo/form/high
click "新增成员" on the bottom of this page.
It don't show the new blank row as I expected.
But when I drag this page windows size.
the new row show out.

Reproduction

open url: https://vvbin.cn/next/#/page-demo/form/high
click "新增成员" on the bottom of this page.
It don't show the new blank row as I expected.
But when I drag this page windows size.
the new row show out.

System Info

• Operating System: windows 10
• Node version: v12.20.0
• Package manager (npm/yarn/pnpm) and version: 1.22.10