The quest item "The Hammer of Kamaza" can not be got

[dbw413]

I met another problem with the similar bug I post before.

After I killed the boss in act3 "The Molten vault", the quest item just dropped in the edge place that can not be picked up.

So I tried to respawn at the check point. The item dropped down in the tunnel, but the lift does not work, so I can not go down to the tunnel now.

In the game some senior players told me, respawn at the check point can be used to fix the bug. However, after the recent update, I just found it brought more problem than it fixed.