[Client] No chest awarded when premade gets S, I don't get S

Hi, just got out of a game with my friends. they got an S, I didn't, no chest awarded. (the character I was playing was a character that wasn ot shown as getting a chest on- Miss Fortune. I had a chest on her last season)

I've gotten chests since the start of new season on characters that I did get an S on, and my premade also got a chest that time too. (He was level 9). This was during this weekend (where it worked). Today, it does not work.

I am using the legacy client. (The Updated one does not fit my screen ratio and I cannot resize it, and this feature still has not been implemented. Previously, when it was working, I was also using the legacy client.)