Attempting to open an ominous vault with a normal trial key will grant the “Under Lock and Key” despite not successfully opening the vault.

What I expected was…:
Trying to open the ominous vault with a normal key won’t grant any advancement.

Instead what happened was…:
Trying to open the ominous vault granted the “Under Lock and Key” advancement.

Steps to reproduce:

• Find a trial chamber.
• Defeat some trial mobs to obtain a trial key.
• Use a wind charge to get to the ominous vault.
• Attempt to open it with your normal trial key.
• You will earn the “Under Lock and Key” advancement.