I am not sure this process of hidden chest is working correctly or not.
But, the steps are weired that Khaldun Chests need to dectect twice.
Step 01 : Using Dectect hidden to the chest.
Step 02 : Unlock the chest (Then the chest disappear again).
Step 03 : Using Detect hidden again to the...
The hidden box you can find in the Kaldun dungeon is not spawned even if the event is activated.
Also, the types of items in the box are different. During the event period, relics must also be found in the box.
The shape of the box also appears to be different from the official...