routeData params are empty but not useParams

import { RouteDataArgs, useParams, useRouteData } from "solid-start";
import { createServerData$ } from "solid-start/server";

export function routeData({ params }: RouteDataArgs) {
  return createServerData$(() => {
    return params;
  });
}

export default function Stuff() {
  const params = useParams();
  const routeData = useRouteData();
  return (
    <main>
      <p>{`params: ${params.slug}`}</p>
      <p>{`routeData: ${routeData.slug}`}</p>
    </main>
  );
}