Build issue with unocss vite 2.9.1

[itpropro]

When building a small component library with "vite": "^2.9.1" and "@vitejs/plugin-vue": "^2.3.2",, vite build always produces the following error:

...
vite v2.9.14 building for production...
transforming (6) ...
✓ 9 modules transformed.
dist/components.es.js   5.75 KiB / gzip: 1.93 KiB
dist/style.css               10.08 KiB / gzip: 2.65 KiB
rendering chunks (1)...[unocss:global:build:generate] [unocss] does not found CSS placeholder in the generated chunks,
this is likely an internal bug of unocss vite plugin
error during build:
Error: [unocss] does not found CSS placeholder in the generated chunks,
this is likely an internal bug of unocss vite plugin
...

There is just one basic .vue component for testing that is exported with

import '@unocss/reset/tailwind.css';
import 'uno.css';
export { default as Test } from "./Test.vue";

When changing to the latest (v3) version of vite, everything works fine. Unfortunately I am using histoire, which is not Vite 3 compatible yet.
The resulting style.css are the same with and without the error, but the build stops before generating the umd version.

[itpropro]

I will just use Vite 3 with histoire-nuxt :)