Version

3.0.0

electron: 9.0.0

Reproduction link

https://codesandbox.io/s/optimistic-tu-leqic?file=/src/demo.vue

Steps to reproduce

What is expected?

Normal, no warning required

What is actually happening?

[Vue warn]: Failed to resolve component: webview at <Demo onVnodeUnmounted=fn ref=Ref< null > > at at

see https://v3.vuejs.org/api/application-config.html#iscustomelement