Redirect doesn't work in dev mode

export const handler = define.handlers({
  async POST(ctx) {
    const form = await ctx.req.formData();
    const content = form.get("content")?.toString();
    const created_at = form.get("created_at")?.toString();

    if (!content || content.length < 1 || !created_at) {
      return {
        data: { error: "make sure to type something !" },
        status: 422,
      };
    }

    try {
      db.prepare(
        "insert into notes (content,created_at) values (?,?)",
      ).run(content, created_at);

      return ctx.redirect("/notes");
    } catch (error) {
      console.error(error);
      return {
        data: { error: "server error, try again later" },
        status: 500,
      };
    }
  },
});