Issues with authentication cookies?

[CSchank]

Hi @mpscholten and others, has anyone run into issues with the IHP authentication cookie? We've had an issue with 2 (out of maybe 200) students where they suddenly can't seem to log in, and resetting their password doesn't fix it. The only thing that works is to reset cache / cookies or use a different browser. Sorry I don't have any more information for you from the students (I know, this is a pretty terrible bug report!) but I wondered if you had ever run into this before. I wonder if it could be because of our Nginx reverse proxy somehow? Anyways, thanks!

[mpscholten]

I think #1172 was created for this. Nginx has a header length limit. If a flash message is too large, it could corrupt the session cookie

A workaround is to increase the header length limit