Not getting chest

This happened to me three times. I get a score that is worthy enough to get an S rank, and the client just poops on me, not giving me the S, thus further, the chest I am supposed to get. This has happened to me three times already (including this one). Rito pls :c I need my chests.

Look for yourself: https://gyazo.com/e6cf7c9661225ed5abfc12da2b08ba6e

Im pretty sure this has been happening to a lot of people though. It's just stupid that bugs pop up the second they hit the live server, never on PBE.