Unlockable cosmetics not unlocking after getting achievements

1. Why is it taking THIS LONG to fix a quality degrading bug? This bug has been here for what, a whole year? 2 years? I dont know but its veen a long time. My little sister really wants this Wolf mask comedic for her charater, why is it taking this long to fix it? From what I can understand in my free years of coding. It's a simple Input error? Simple fix that input that isnt connecting to the Items! It isnt that hard!