Cannot broadcast messages to different topics but only from one channel

I’m working with Channels and Endpoint to send messages between the channels and their topics. I recently had to add a new ‘inter-channel’ communication path to remove some data. Basically, an admin will send a message to its own admin channel to cancel the order from employee x, the handle_in will then do a broadcast to employee:x with the message “finish_order”, which already has its handle_in function since the employee can also finish the order itself.

Problem is that I can’t seem to be able to send the message to the employee channel:topic. I’ve even tried hardcoding the employee topic but it just never hits the channel. What feels even more strange is that I’ve been using Endpoint.broadcast! throughout the program and it’s been working perfectly. Employee can send broadcasts to Clients, Clients can send to Employee. Only Admin isn’t able to broadcast and I just ran out of things to try.

# Admin
def handle_in("remove_order_from_driver", %{"client_id" => client_id, "order_id" => order_id, "employee_id" => employee_id}, socket) do

    Logger.info("Admin is removing an order from #{driver_id}")

    Endpoint.broadcast!("employee:#{employee_id}" ,"finished_order", %{client_id: client_id, order_id: order_id})

    {:noreply, socket}

  end

# Employee
def handle_in("finished_order", %{"client_id" => client_id, "order_id" => order_id_client},socket) do
# Logic to end the order, which is already being used by the employee frontend.
{:noreply, socket}