Bug 4: Random Auto Logout

I have been noticing when I have at least 2 youtube videos going at the same time chrome os seems to log me out for no reason.  This problem is really bugging me. I hope google fixes this problem soon in the next update. It would help alot. I would be watching a video and then open one in another tab and then chrome os would log me out and it gets annoying sometimes. I hope this gets fixed!