Puck disconnecting after running function from the browser without passing a callback.

Hi,

Been playing around with the Web Javascript API and have noticed that if you don't specify a callback on some functions the Puck will disconnect instantly. For example:

Here is what I want to do

let connection;
Puck.connect(conn => {
    conn.write('LED1.set();\n');
    connection = conn;
});

// Use this function later when a button is clicked
const resetLEDOnButtonClick = () => {
    connection.write('LED1.reset();\n')
}

Expect when I call the resetLEDOnButtonClick a while later the Puck has been disconnected.

I've ended up having to pass empty callbacks everywhere just to stop it disconnecting. For example:

let connection;
Puck.connect(conn => {
    conn.write('LED1.set();\n', () => {});
    connection = conn;
});

// Use this function later when a button is clicked
const resetLEDOnButtonClick = () => {
    connection.write('LED1.reset();\n', () => {})
}

Is this expected or am I using the API wrong?