loosing time when premoving


Lag can be introduced anywhere on the path. I don't play bullet that much but don't really notice any significant issues in blitz.
https://support.chess.com/article/213-how-do-i-fix-my-disconnect-lag-issues
Though, if you are playing on the iOS app, I've have seen posts from other members where they seem to be experiencing more lag on the app than might be normal.