Not getting key fragments

I have only got 2 key fragments this month, even tho i have been playing everyday (im honor 4 checkpoint 1), getting also honored pretty often. Feels weird that havent gotten any key fragments for weeks. Arent we supposed to get 12 key fragments per month? And does bought keys from store affect this amount? I bought like 2-3 keys from the shop this month. This is also happening to my EUNE account and another EUW smurf account. Or maybe my accounts are just bugged for some reason?
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