Version

3.2.0-beta.5

Reproduction link

Playground

Steps to reproduce

• Click the toggle button twice
• Check the logs

What is expected?

Should log unmounted twice but it logs only once

duplicate of #4183, the dynamicChildren is an empty array and will be fixed in #4186 (if it's the right fix😄)

@edison1105 Thanks! I've subscribed the PR.

Updated the repro so it doesn't contain vue router