It happens when you are in Live and have a session loaded in another tab or another device (such as the app). I've had it happen when I had a session on one computer open on Chrome, left for a while and opened another session to the site on a different device later. The session on the Chrome tab refreshed and caused it.
I know there have been some code updates in the beta to work on that problem but have no idea if that has made into the general code or not. Ideally, all session refreshes would prompt to see if they are actively being used rather than resetting a connection. That would require updating apps as well as the web at the same time though.
there's this really annoying bug on chess.com where on live chess i get the message 'another login has been detected' randomly popping up on my screen, forcing me to refresh. this has made me lose many games, and i've changed my password so i know it's a problem with the site.
does anyone get this too? chess.com needs to fix this...