W.H.Y.?
Can you post a link to the game, please?
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If you look at the move times, after the last move, White had 00:00.09 left, but it shows up as 00:00.0. So if it makes you feel any better, it seems like the UI could be more precise, but your opponent did have "some" time left... it seems.
Thx for the suggestion. Was a weird game anyway. 10 moves before the end I had a time advantage 22 to 5s, I started premoving, opponents moves came in like every 2/3 seconds, but my time ran out. Very strange. But whatever. Maybe Carlo Rovelli is right that time doesn't even exist... ;)