Possible bug: y-partykit readOnly option is not working properly

[AMR-21]

I was playing with the Tiptap example in the docs and I tried the readOnly option but it seemed not to be working. when I set it to true as shown down, I can still edit the editor and changes are propagated as if the option is set to false.

export default class implements Party.Server {
  constructor(public party: Party.Party) {}

  async onConnect(conn) {
    const party = this.party;
    const supabase = createClient(
      this.party.env.SUPABASE_URL as string,
      this.party.env.SUPABASE_KEY as string,
      { auth: { persistSession: false } }
    );
    await onConnect(conn, this.party, {
      // persist: false,

      readOnly: true,
      async load() {
        // const { data, error } = await supabase
        //   .from("documents")
        //   .select("document")
        //   .eq("name", party.id)
        //   .maybeSingle();
        // if (error) {
        //   console.error("ERROR", error);
        // }
        // if (data) {
        //   const doc = transformer.toYdoc(data.document, rootFragmentField);
        //   return doc;
        // } else {
        return new Y.Doc();
        // }
      },
      callback: {
        handler: async (doc) => {
          // console.log(doc);
          console.log("doc changed");
          // doc;
          const json = transformer.fromYdoc(doc, rootFragmentField);
          console.log(json);
        },
      },
    });
  }
}