To begin, I had zero issues with this about 4 months ago.
My laptop will connect to the CableWIFI or TWCWifi hotspot SSID and MAYBE load the first URL I go to, then stop loading anything. It won't let me connect to the Passpoint at all.
However my phone will let me connect to the Passpoint or any of the others, no problem. I can browse freely.
I have tried with 2 different laptops of my own and a friend. Same deal.
I notice that I get assigned an IP address on my laptop, no problem AND I can get to the Spectrum website reliably. Is there a login page that is supposed to come up or something? Is there a URL for such a page? I only get prompted for a login when I try the passpoint and that is thru the Wifi settings on Windows.
Mac or Windows, what version?
Only at one hotspot or multiple ones? If only one, have you deleted it and then tried to rescan for it and log in again?
What wireless band, 2.4 or 5.8 gHz?