How rated match becomes non-rated?

I join this rated match http://ru.lichess.org/analyse/zjyibogs
but when my opponent leaves - then match becomes non-rated. and this is not a 1st time i've seen that. How its possible?

because no move was played.

lol? 16 moves were made

that's right. I wrote that before my first morning coffe. I've now opened an eye and I see the played moves.

Now I doubt that the game was even rated at the beginnning. There is no mechanism in lichess that can change that value of a game.
Did you create the game or join one in the lobby?

i joined to all of those matches when i see transformation rated into non-rated. i saw it before about 3-4 times, and this is my 2nd post about that.

So you clicked a rated match offer. Are you sure you got the game you wanted? Sometimes the match offers switch quickly and you find yourself on someone else's game.

Yes, im sure, i didnt play any non-rated matches, its not interesting to me, and u can check it at my profile.