New loading screen doesn't work over HTTPs

[csheppard]

Version

v2.5.1

Reproduction link

N/A

Steps to reproduce

My local set up is Docker > Traefik (with HTTPs) > Nuxt.

The web server automatically redirects insecure connections.

What is expected ?

Connect to loading screen web socket by either ws:// or wss:// depending protocol of the loaded page.

What is actually happening?

The web socket is only connecting via ws:// protocol.

This fails due to a 302 redirect from my web server for a forced HTTPs connection.

_{This bug report is available on Nuxt community (#c8901)}