Netflix netops/eng folks, you might want to take a look at your login and pw reset flows for IPv6.  Chased a problem all morning of not being able to login, problems resetting passwords, and not being able to login immediately after pw reset. Tried on multiple devices.  All solved by disabling IPv6.   I knew there was a difference in content available on v4 vs v6, so took a guess there might be problems logging in as well.