Your Shop gave me skins for champions I've rarely/never played

I've been playing a lot of PBE since ARURF arrived, but one champion I've never ever played is Elise. I opened my 'Your Shop' offers on PBE and Super Galaxy Elise is one of the offers. Coven Camille is also another, and I've only played one game with her on this account. This might be because PBE is a different environment and doesn't use the same rules to decide what offers we get compared to live server, but I just wanted to report it in case it is a bug
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