malfunction
You likely got disconnected. If you are using the website, take a look through the following to see ways to limit disconnects.
https://support.chess.com/customer/en/portal/articles/1444918-my-internet-connection-is-fine---why-am-i-getting-disconnects-
and
https://www.chess.com/blog/News/how-to-adjust-your-live-chess-connection