Hello. The bug - It's almost April and i still have helloween masks and vanu holiday beanie in my inventory. Despite i can't wear these masks (when i try to do so, nothing happens), i CAN wear holiday beanie and even more, i still get XP bonus from it. Also, when i wear holiday beanie, i can see it on my character in my inventory, but other people see me without it (e.g. without any helm, just bald head). I also heard, other people still have the beanie too
