Ваше подключение к сети
The site doesn't normally return ratingg for connection issues, unless it was caused by a major problem impacting a large number of games. In that case, automatic refunds occur.
There's are some things that can be done to to minimize issues
https://support.chess.com/article/4720-online-chess-performance-optimizations
https://support.chess.com/article/213-how-do-i-fix-my-disconnect-lag-issues