Switching between slot children's children that have `v-if` does not update dom

[rashfael]

Version

3.0.11

Reproduction link

https://jsfiddle.net/Lrnebjuv/24/

Steps to reproduce

• Click button "Click me" multiple times

What is expected?

Text below button should show 1, 2, 3 in a loop

What is actually happening?

Text shows 1, 1, 3 instead

---

Also happens without .children.default() using <slot></slot> instead in this variant https://jsfiddle.net/Lrnebjuv/25/

Original context is a tab component:
rashfael/buntpapier#22
https://github.com/rashfael/buntpapier/blob/vue3/src/tabs.js

[edison1105]

as a workaround add key to p:

    <Bar>
      <p key="1" v-if="true">
        1
      </p>
    </Bar>
    <Bar>
      <p key="2" v-if="true">
        2
      </p>
    </Bar>

[yyx990803]

2010607 is a partial fix which does not fix the <slot/> variant