Version

3.0.7

Reproduction link

https://codesandbox.io/s/red-microservice-7tx88?file=/src/components/List.js

Steps to reproduce

Please have a look at the minimal reproduction demo

What is expected?

The components in the function should render correctly

What is actually happening?

The child component Item is not rendered

you should

h(Item)
// or
h(resolveComponent("Item"))