while i'm playing few sec ago i already won  out time against ny opponent then it bound on me that ilost the game?cause' out of time in my part , i don't know how it happened?that's impossible, we have to solve this kind of problem not only in favor in my part but for everyone also

Did you click on the button "claim win on time"?

If it's live chess, you just lagged. Happened to me a ton of times.