Sulphuric Caverns boss - no loot

Sulphuric Caverns have two bosses. I call them bone elephant and caster.
When bone elephant dies there is absolutely zero loot from him. When caster dies, he drops for example orb of augmentation and 2000 gold. So together no maps, nothing valuable. I tested that several times, last time 82 level juiced map.
This must be bug, please repair.

P.S. I guess it's connected with previous bug where bone elephant did't appear at all which was alread repaired.