Changing the port breaks reloading

After modifying the port number from 81 to 80, the page spits out an error:
___vscode_livepreview_injected_script:28 WebSocket connection to 'ws://127.0.0.1:81/' failed

Reproducible Steps:

1. Change the "Live Preview: Port Number" option from 81 to 80
2. Start the server
3. Open the page externally (I'm using the Brave Browser)
4. An error should appear in DevTools' console

Expected Behaviour:
I expected the websocket connection to point to the new port number of 80, but it still attempts to connect to 81

Suspect Code:
Line 27 & 28 of ___vscode_livepreview_injected_script:

function onLoad() {
	let connection = new WebSocket('ws://127.0.0.1:81');

I do not know what writes these values, otherwise I'd write a PR.

Images: