Version

3.0.4

Reproduction link

https://codesandbox.io/s/cool-bird-0pzue?file=/src/App.vue

Steps to reproduce

1.

// App.vue
setup() {
    const isReady = ref(false);
    setTimeout(() => isReady.value = true, 1000)
    return { isReady }
}

2. Create a Container.vue component.

// Container.vue
<template>
  <slot></slot>
</template>

3. Use the Container component in the App component.

<template>
  <div>
   <Container>
      <div v-if="isReady" >Hello Vue 3.0</div>
  </Container>
</div>
</template>

4. Crashed when setTimeout was executed and isReady changed.

What is expected?

It should render Hello Vue 3.0 on screen.

What is actually happening?

Crashed

None.

Duplicate of #2715