Vue version

3.3.4

Link to minimal reproduction

https://stackblitz.com/edit/bluwy-create-vite-extra-uaq5oj?file=src%2FApp.vue

Steps to reproduce

The linked StackBlitz has a <Parent /> component that has a custom render function that just renders its default slot.

It then has a <Child /> component that renders a text I should not show.

The App.vue then uses these two components as below:

  <Parent>
    <Child v-show="false" />
  </Parent>

What is expected?

The child component should not be rendered on SSR-rendered HTML. The text I should not show should not be displayed at all in any stage of the page load.

What is actually happening?

There is a flash of text I should not show which is removed when hydration kicks in.

This does not happen when using v-show on a native element instead of a custom component.

System Info

System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 18.18.0 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 9.4.2 - /usr/local/bin/npm
    pnpm: 8.10.5 - /usr/local/bin/pnpm
  npmPackages:
    vue: ^3.3.8 => 3.3.11

Any additional comments?

No response

Noticed initially when using v-show on a child component of a Nuxt component <NuxtClientFallback /> as reported here

duplicate of https://github.com/vuejs/core/issues/6123