BUG : Checkmate not detected

Hi,

On the game lichess.org/CY2jgLTp9XH4 I was checkmated, but the time kept running out and i got a warning "Warning, sipra. Letting time run out instead of resigning will result in a temporary ban."

Here is link of the screenshot : imgur.com/a/KENkIos

I have played several bullet games just now in which mate just didnt end the game.
This wasnt happening yesterday.

There are no legal moves to be made and time keeps running. But if you leave the time starts at the mate.
So you can basically avoid mate after being mated.

It occurred both when I mated and when others mated me.

the only way to end the game is to let the time run out.

They fixed it. That was quick!