`vnode.data.on` is empty for custom components

[posva]

Version

2.6.11

Reproduction link

https://jsfiddle.net/ck6qgezv/

Steps to reproduce

• check the logs

What is expected?

Both should be able to log vnode.data.on

What is actually happening?

Only the component with a native event attached does

---

From vuejs/vue-router#3308