Unable to switch accounts

The subject says it all. No matter how I navigate to the Switch Accounts link on the customer.xfinity.com page I can't switch to a new account. The OAuth polaris.xfinity.com just redirects me right back to the page I was already browsing, without allowing me to change my account. I've tried on a Mac with Safari and Firefox, on Windows 11 with Firefox and Edge, and on iOS with Safari. I've cleared all site data in each of these browsers and I've completely disabled all content blocking and enhanced tracking protection.

Since the mobile application apparently relies on this to change accounts (which is a terrible user experience) I cannot make any changes to my other account, which includes provisioning new hardware, updating billing details, everything. I'm unable to provision a new modem and the modem I'm attempting to provision got provisioned to the wrong account, which took the phone support team almost 2 hours to fix, but I'm still unable to provision to the account since there's simply no way for me to select it.

The worst part of this is that I can see the account, and it's listed as "Inactive" on the web site or simply not badged on the mobile application, but from that page I have no option to simply select that as the account I'd like to update.

Please fix this redirect/OAuth/token bug as soon as possible.