I won on time but my rating is decreased.

Please check out this game.

I won on time but look at the rating change, my rating is decreased.



Thank you.

Hmm maybe lichess think that is draw?

Ok no problem.

There's no way for a lone bishop to mate against a queen. Had your opponent flagged one move earlier, you would have won. Since black declared that he was promoting to a queen, the best you can get is a draw.