Can't get CSS to be included synchronously

[FrDH]

Question

We're not using critical CSS (maybe some day) and want the CSS to be loaded synchronously, but for some reason setting the 2nd argument to false does not work:

{{ craft.vite.script("src/js/app.ts", false) }}

There is about 2 second FOUC every time I navigate to a new page, which is really annoying for one, but also completely destroys all (the possibility to test) view-transitions.
For now, I resigned to including the CSS in a style tag before including the JS (in local environment only)

{% if craft.app.env == 'local' %}
	<link rel="stylesheet" href="{{ craft.vite.asset('src/scss/app.scss') }}">
{% endif %}
{{ craft.vite.script("src/ts/app.ts", false) }}

Any thoughts?

[khalwat]

You're seeing the FOUC only in local development when using the dev server ya?

[FrDH]

Yes, there is no FOUC if the dev server isn't running