Login issues after upgrading from 3.7.1 to 3.8.5
 

Hi,

I upgraded www.btcf.fi/forum from 3.7.1 to 3.8.5. We have ~25k users and ~1.4 million posts. We did not face any login issues with 3.7.1 but got some issues after upgrade.

I'm logging in with Remember Me box checked. Forum works fine, but sometimes when I'm opening a section/thread/post it throws me to the login page (You are not logged in or you do not have permission to access this page. This could be due to one of several reasons:) If I refresh the page it forwards me the section/thread/post I requested in the first place.

I cleared the cookies but it didn't help.

Path to Save Cookies: /forum/ [options / and /forum/ ]
Cookie Domain: (blank) [options: (blank) and .btcf.fi]

This is affecting many users with different OS and different browsers. I don't have any specific way to reproduce the issue. It just sometimes appears.

Hopefully somebody can help with this issue.

Cheers,
Doni