Vue warning of duplicate keys in v-for are shown randomly

[michaelcozzolino]

Vue version

3.X

Link to minimal reproduction

https://stackblitz.com/edit/vite-4jdq3cfy?file=docs%2Fexample.md

Steps to reproduce

Just create a vite app and a vue component having v-for with duplicate keys. the warnings do not always appear.
check vuejs/vitepress#4577 also for an explanatory video.

In the reproduction url i have given, the warnings seem to not appear at all

What is expected?

warnings must always be shown

What is actually happening?

warnings showing randomly

System Info

Any additional comments?

No response

[edison1105]

A warning will be issued during v-for updates if there are duplicate keys. The key affects v-for updates but does not affect its initial rendering.
So, this is the expected behavior.