What might cause style hashes to be mismatched after build?

[whalderman]

During vite dev all styles render correctly (with the styles inlined), but once I vite build the package with the Node.js adapter and vite preview, CSS class selectors no longer match the selectors on the page:

<div role="presentation" class="hull svelte-ae2raf">

/* _app/immutable/assets/_layout.BdQCCEDs.css */
.hull.svelte-ssse1v {
	...
}

Does anyone know what might be causing this?

"svelte": "5.0.0-next.151"
"@sveltejs/kit": "2.5.10"
"@sveltejs/vite-plugin-svelte": "3.1.1"
"@sveltejs/adapter-node": "5.0.1"
"svelte-preprocess": "5.1.4"
"vite": "5.2.12"
"postcss": "8.4.38"
"postcss-load-config": "5.1.0"

[whalderman]

Replacing the prepocessor from svelte-preprocess with the preprocessor from @sveltejs/vite-plugin-svelte fixed it, but unfortunately I'm not sure what caused the issue.