After logging into meta I got "No active login attempt is in progress for your session."
I got autologged into the wiki, and redis is still running (and has been for 3 days now).
Might have been a one off glitch, or possibly a cache-related issue if you tried to login immediately after changing the domain.
I know that this is an old task, but the error is still happening. In fact, whenever I log in to another wiki where I am not "kept logged in", this error pops up and requires me to reload the page and then login again. The error seems to be generating on the Special:CentralLogin page, which I think has something to do with CentralAuth.
This falls into the category of "upstream issue (by way of issue or support) which is getting no progress and even so, having a ticket in our tracker is literally pointless. This isn't causing major issues therefore, if we get rid of this ticket no one will really notice or care".