There is a pesky bug which will be fixed on the next update which is the big one.
You can be browsing along when you're suddenly signed out, annoying right? I know.
When this happens do not try and log back in, just refresh your browser and abracadabra you're logged back in. (Might take a couple attempts)
This pesky bug mainly targets people that use multiple devices, although it has been known to tinker with one device users as well.
I do apologise for any inconvenience caused whilst browsing this glorious forum, the update which will fix this should hopefully be out in the next few weeks, whilst you wait I encourage all users to be vocal in their complaints to Boycie, it's all his fault.
