Yeah, it's just the app. It does the sane for me, where occasionally it just keeps saying loading. But personally if you way to chat on Facebook, go on a computer. A lot of people say the chat doesn't work well on the app, myself included. Messages sometimes don't send, or the person your talking won't be able to send you messages. They might update the app, but it's been this way for the past like 3 updates. Sorry, just try and use the computer fb or send messages.