socket.to(roomId).emit() does not work

[KNT59]

Describe the bug
On server-side, socket leaves its default room, joins a different room, then socket.to(newRoom).emit() is emitting message back to the calling socket when it shouldn't.

To Reproduce

Socket.IO server version: 4.8.1

Server

import { Server } from "socket.io";

const io = new Server(3000, {});

io.on("connection", (socket) => {
  socket.on("foo", async () => {
    await socket.leave(socket.id);
    await socket.join("7a4ccc57-96b4-45a3-963f-02cc1512ce0d");
   
    // This line emits back to sending socket, which goes against the documentation for socket.to().emit();
    socket.to("7a4ccc57-96b4-45a3-963f-02cc1512ce0d").emit("foo", "response");
  })
});

Socket.IO client version: 4.8.1

Client

import { io } from "socket.io-client";

const socket = io("ws://localhost:3000/", {});

socket.on("foo", () => console.log("received message"));
socket.emit("foo", "backend message");

**Expected behavior**
The emitting socket should not receive a response from the backend socket.

**Platform:**
 - OS: Ubuntu/Linux