Mobs in dungeons no longer picking items?

I was wondering if this was an intended change. There was a player today that casted defenselessness in the side off the screen and got jumped. But the mobs wouldn't come pick up the gold/mana off the flower to get back on screen.

last time I tried it took 1000 mana to get the mob to move.
If the mob gets stuck in a wall I'm not sure anything can get them out.