(I'll explain the best I can but I'm not exactly sure what I'm talking about so if you need farther clearification let me know)
Often lately when I go to message people I'll type out my response and then when I hit reply nonoba will get rid of whatever I had written as a response, pop up the little unexpected error thing, and then ask me to log in. It's very frustrating when you type up a long message to someone and have it completely vanish in the blink of an eye. You shouldn't have to cross your fingers and hope that hitting reply will send your message instead of getting rid of it :]
There should be some way to like make it so the page doesn't refresh when it makes you sign in or something so your message doesn't go away. Or maybe something to let you know that you're not signed in anymore in the first place? Not sure how to fix the problem, but it definitely needs fixing.