I'm having a problem with Safari on the iPhone fully updated and previous iOS versions as well. When I turn off guest access to everything, the login screen is basically unusable. Very slow to do anything. When I request the desktop site in chrome, works fine, safari seems to be an issue even when desktop is requested.. When I give guest access and then go to the login screen, works fine.
I've tried to verify it on a base install and it still seems to appear. Can anyone else validate this is a root issue or just something on my deployment?