S-rank not giving Hextech lootbox

After playing myself up to rank 5 with Lux support (yes, it is a thing, not for this thread) I am finally getting some S-rank games. To my surprise, despite having chests "available" not a single one of my recent 6 S-rank games has given me any of those available chests. Before you say anything, No I have not gotten any types of bans in any way and I get no messages why I am not getting these chests. Please fix this broken system as if you implement something, at least make it work like you claim it should.
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