Ring.com has blacklisted my home IP address

All access to ring.com, either from a browser or the Android app, are now returning a 406 with the text `not acceptable`. Connecting through a proxy has the system working as expected. Things I have done: * Tried a different browser, behavior persists in Chrome, Edge, and Firefox * Cleared cookies and cache * Tested in normal and incognito/private mode All attempts result in `not acceptable` if they originate from my home IP (Comcast cable modem). No VPN is present, but I do have access to a VPN and if I turn that on (thus changing my originating IP), everything works as expected. Why is ring.com blacklisting Comcast cable modem IPs?