Free chest bug when getting an S?

So i just logged in checked my profile and it said next chest avail in like 1 hour. I play some aram and dident really check to see if i got S in one of the games or not. Then just now i checked again, but now it says next chest avail in 7 days. So i check the Loot tab, but no chest was given. Also under the chest symbol on my profile it says 2? Am i missing something?
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