Check out this Chess.com support article:
https://support.chess.com/article/423-why-did-the-clock-times-suddenly-change-the-clocks-seem-broken
Check out this Chess.com support article:
https://support.chess.com/article/423-why-did-the-clock-times-suddenly-change-the-clocks-seem-broken
Why are my opponents geting time added to their clock? In the last minute of my games, I notice the opponent gets 10 seconds or so added to their clock.