please fix time lag issues.


You got disconnected, most likely. The site can't control the quality of every connection between you and the Live servers.
https://support.chess.com/customer/en/portal/articles/1444918-my-internet-connection-is-fine---why-am-i-getting-disconnects-
https://www.chess.com/blog/News/how-to-adjust-your-live-chess-connection