Vue version

3.3.7

Link to minimal reproduction

https://play.vuejs.org/#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

Steps to reproduce

1. Click the first button to increase the count
2. Tap the Hello World! title to append the component to first

What is expected?

Hello World! 3 [btn] 0 1 [btn] 1 2 [btn] 0

What is actually happening?

Hello World! 3 [btn] 1 1 [btn] 0 2 [btn] 0

System Info

No response

Any additional comments?

No response

workaround: add a key

<div v-for = "item in list" :key="item">

Expected.

https://vuejs.org/guide/essentials/list.html#maintaining-state-with-key

This default mode is efficient, but only suitable when your list render output does not rely on child component state or temporary DOM state (e.g. form input values).

Stateful child components must use key to ensure correctness.