Trial Mask comes out as a sale item

When I redeemed the trial mask, instead of appearing in the equip cosmetic part, it appeared in the area to buy cosmetics.

Expected result:
That the cosmetic appears in the equipment part

Actual result:
It appears in the cosmetic purchase part

How to reproduce:
1. entering the character's locker room.
2. select face object.

This is a fairly rare bug to happen that could affect in-game redemptions.