- Disturbance Detected: Ulduar
- Unable to loot Titan Prison Fragment
- Killed Yogg-Saron but could not complete quest
A Titan Prison Fragment will only drop during the Timewalking difficuly of Ulduar. You must be on the quest "Disturbance Detected: Ulduar" to receive it.
Note that the Fragment must be looted manually - it is not automatically pushed to your inventory.