Acidic skin was the cause. Which why is that even a thing?
No idea, I'm not a fan of monster abilities that explicitly punish players for not having hoarded sufficient loot.
I'm of the opinion that *love* and Acidic Skin effects do nothing to enhance the game and should be removed entirely. Shatter and Destroy -- at the very least -- should be raised in level significantly and only retain their current power level. i.e. Shatter should be 8th level, Destroy should be 9th and their respective damage vs Constructs should remain the same.