That was very weird.. I was restocking and had just put in the captcha... the item I was buying was sold out, not sure if that had anything to do with anything or not. But I have the arctic theme activated and everything went green... the default theme color I am assuming. I tried to go to my inventory, and it took me to the log in page. Should I be worried??
I have never been logged out in the middle of something. I have been logged out between sessions on Subeta, but I've never had an incident of that happen.
I would recommend when that happens that you close the window and open a new window with subeta to see if it was the site that logged you out or not. If you're worried that you may have been hacked or such, you can always change your password.