Vue version

3.1.0

Link to minimal reproduction

https://stackblitz.com/edit/vue-3-composition-api-demo-vaedev?file=src%2FApp.vue,package.json

Steps to reproduce

涉及到slot的时候
外面的slot内容延迟渲染，就会导致无法覆盖slot内部的默认内容
v-if="showOutBtn"

What is expected?

外面的slot内容覆盖slot的默认内容

What is actually happening?

System Info

No response

Any additional comments?

No response