It's happening to me. I don't know the exact time limit but 3 minutes sounds close. I'll be typing a message and then by the time I click post, it redirects me to log in again. I thought I lost my messages, but luckily was able to go back to the previous page and the form was still filled in. So I have to copy the message to clipboard, log back in, navigate to the forum again, pasts my message into a new posting, recreate the title and then post. I never encountered this on other forums, except if I idle for way longer. This was the fasted log out I ever experienced so far.
Windows 8.1 64Bit using latest version of IE
EDIT: same thing just happened to me on my MacBook using Safari browser
Last edited by sjs78; 09-06-14 at 01:09 PM.