Version

3.0.7

Reproduction link

https://runkit.com/exe-dealer/vue3-ssr-issue

Steps to reproduce

import { createSSRApp } from 'vue';
import { renderToString } from '@vue/server-renderer';

renderToString(createSSRApp({
  template: `<component is="x" v-for="_ in [1, 2, 3]"></component>`,
  components: {
    x: { template: `<div>x</div>` },
  }
}))
.then(console.log);

What is expected?

<div>x</div>
<div>x</div>
<div>x</div>

What is actually happening?

<div>x</div>
<x></x>
<x></x>

It also warns

[Vue warn]: resolveComponent can only be used in render() or setup().
[Vue warn]: resolveComponent can only be used in render() or setup().

I think this is a duplicate of https://github.com/vuejs/vue-next/issues/2863

Duplicate of https://github.com/vuejs/vue-next/issues/2863