With stage 1 live here is a scenario that doesn't let you log in once logged out.
Repro steps in Chrome on Win7:
- clear all cookies/session storage
- goto meta.stackexchange.com
- click login (I use google)
- I'm logged in
- From the menu choose Log Out
- Click the Log Out button
- You're logged out
- click Login (I use google)
- I'm not logged in
I can iterate step 7 and 8 but I never get logged in. Only after pressing F5 I am able to login again.
One other thing I noticed which I'm not sure if this is related. This dev console shows:
POST https://meta.stackexchange.com/users/login/global/request 404 (not found)
whenever I try to login.