Unkown, you repeatedly report this bug but never give enough information for us to do anything about it, and then it resolves on its own, and you don't report that it is resolved. See a pattern?
We need to know where you logged off, what error you're getting, and for how long. It should be a significant amount of time before you report this as a "bug" when it is most likely just a small connection issue. And you're currently online. Please only report that you cannot connect if it has been at bear minimum 30 mins.