Drawer render in current dom abnormal behavior

[chkaos]

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

Version

1.7.8

Environment

vue 2.6.11

Reproduction link

https://1x.antdv.com/components/drawer/#Drawer

Steps to reproduce

Offical Doc of component drawer "Render in current dom"

What is expected?

.

What is actually happening?

Abnormal behavior after first mounted.

[chkaos]

https://github.com/vueComponent/ant-design-vue/issues/3703

[github-actions[bot]]

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