It's kinda normal to have it i had it once and i was really angry.
You can fix it by waiting for atleast 2mins and if it logs you out then it should show a message.
Or if you click the sf screen you will see a white sf screben pop up you dont want that cause there will be no response to sf.
Not much help but i tryed.
Hope this helps!
Xfire: Laxerash