35 victories to get the chest bug and raiting bug

In the current ranking season, you need to complete 35 victories to get the chest. I’ve completed 36, but I haven’t gotten the chest. I can send a screenshot where you can see the progress, and the lack of a corresponding tick on the subject. My second question is about the rating system. I’ve already reached the mark above 600 points of the rating a large number of times, and sometimes it turns out that one of the players leaves the match at the stage of choosing a character. At this point, my rating turns to 0. Or I have a disconnection with the Internet, and after the game, I my rating instantly becomes 0. Why? Explain how this rating mechanic works? Or is it a bug?