New device logged in?

Just casually playing blitz and then BAM "you have been disconnected because you logged in from another device" (or sth like that). I did a quick research about it and apparently its a bug. But the thing is its not the same as mine. For their cases, it either because they opened multiple "chess.com" tabs or they are just forced to refresh. Nothing beyond that. In my case, the game continue WITHOUT me doing anything. I was about to refresh thinking its just a forced refresh but no, the timer continued and so was the game. I watched how it would go and it was feeding all of my remaining pieces, leaving me with only the king and forcing me to lose. I quickly closed the tab and I have changed my password as of now and I do not know what to do afterwards. I've also checked my email and there was no new logins so I'm guessing the problem is from the website. Please do let me know if this kind of thing also happened to you and what kind of actions I need to take. Thank you.

What game?