blitz - extra time

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Avatar of mashhsam
when I blitz for 5 min, in the last 5 seconds the opponent always has extra time on each move and I don't, because of this they always lose on time. what is the problem??
Avatar of Martin_Stahl
mashhsam wrote:
when I blitz for 5 min, in the last 5 seconds the opponent always has extra time on each move and I don't, because of this they always lose on time. what is the problem??

It lag compensation

https://support.chess.com/article/423-why-did-the-clock-times-suddenly-change-the-clocks-seem-broken