What's the deal with key fragments not dropping anymore?

Hi guys, Just wanted to drop by and share my experience about this. In the last month or so, I've noticed that the drop rate of key fragments is getting lower and lower, it's been more than a week since the last key fragment I received. Now I have many chests in my loot waiting to be opened! So, what's the deal with that? I am not the only one having this issue, many of my friends are experiencing the same problem. We play and win many games each day in order to have those keys (just like what the support staff told me to do). Did they change something? Or did they go back to that old, frustrating habit of key fragments dropping just at the end of each month? Can anyone explain what's happening here? Thanks. P.S. My account is in good shape, no warnings, no bans, nothing, it's clean. (checked that with the support as well).
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