Champion mastery tokens not being given out in preseason?

I was recently playing a Sion game where i got s rank. I have mastery level 6, have no mastery level 7 tokens on Sion and it wasn't an S- I didn't receive mastery level 7 tokens and i just wanna know if its an error or if they're not being given out during preseason. Thanks {{sticker:slayer-pantheon-thumbs}}
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