Doubled subscriptions in React with useSubscription

function ChatIndexComponent() {
  const chatId = Route.useParams({ select: (d) => d.chatId });
  const { send } = useChatActorRef();
  const chatQuery = trpc.chatWithMessages.useQuery(chatId);
  const chat = chatQuery.data;

  // This seems to run twice, but the subscription isn't disposed of when the component unmounts
  trpc.messageStream.useSubscription(
    {
      chatId,
    },
    {
      enabled: true,
      onData: ({ data }) => {
        send(data);
      },
    }
  );