CSS modules, flush of unstyled content

Hey guys, we're trying to use CSS modules or just import CSS, but it doesn't work properly, css applies on the client-side asyncronously and there's a flush of unstyled content. We created issues about it as well
https://github.com/TanStack/router/issues/3023

We're really want to use Start, but we can't go without working CSS modules or at least plain CSS (placed in the same folder as component)