Today I was in a lvl16 Fractal.
The last boss , the legendary archdiviner usually drops his hammer at 75% , 50% , 25% and 1%. All the times it went well . But when he reached 1% I took the hammer , but got teleported in a cage by the ‘dead’ boss. And the hammer just randomly disappeared. We had to die all and do it over because there was no way to get the hammer back.
Cliffside Fractal.