Version

3.0.11

Reproduction link

https://codesandbox.io/s/flamboyant-star-vijce?file=/src/components/Separator.vue

Steps to reproduce

Go to the reproduction link.

Unmount list component

Look at console

What is expected?

BeforeUnmount executes one time for each Separator instance.

What is actually happening?

BeforeUnmount executes twice for the last Separator component.

Cause this problem: https://github.com/intlify/vue-i18n-next/issues/476