..sorry i didn't upload the image. it is this:
is this a bug?

Need to make the screen shot smaller so it will load well, or just provide the link.
In any case, your answer is there: "Game drawn - insufficient material." Black is out of time and White has no material to effect checkmate. The game is drawn per the rules of chess.

I'm pretty sure this isn't a bug. Even though you "won" on time, you had no possible way of checkmating your opponent with just a king if the game continued. However, because your opponent ran out of time, the game was drawn.
hi,
yesterday i played a game that ended in this way:
Please note that the position was lost for me, but the game was won because of the time. in spite of that, we got a draw.
is it a bug?