This is actually the splash page that users would see under certain circumstances such as Hotspot splash page or requesting network access when the access is disabled via a schedule. Given that these pages are dynamic, you’re seeing what you’re supposed to see.
If you switch that to HTTP, you should get a spinner like you see on the S8-PoE because this occurs when the device is managed and is by design. If the device was not managed yet, there would be a field for you to enter the hostname of your local controller (Appliance, Docker container, or LXD container).
I fully understand what you’re saying but I need to admit: I am not used to this “behavior” of a network device.
I am used to be presented with either a login page (not relevant here) or an informative page with device details (referring to e.g. Aruba Instant On).
But a simple “Thank you for using my network” feels a bit weird and an endless spinner suggests “trying to retrieve data” which doesn’t happen - kind of an error message…
Just my 2ct.
But I can live with that.
Thanks again for elaborating.