S ranking with no Chest

Today, I got an S ranking with BlitzCrank (the god of hooks), and did not get a chest. This wouldn't be the first time, but now, with the lack of chests, I feel the need to ask if anyone has had a similar problem, and if there will be a fix. On my player page, my boxes are full, and when i click on the Champion, it shows that I got an S ranking (I believe everything else was an S-).

So yeah.. Am I missing something? Because I didn't get a chest since the reset.

Any help? Thanks in advance.