Mass skills and quest items

[Eselter]

When I kill multiple monsters with mass skill I only get one quest item.

I think it's a bug. I should get quest items from all monsters that I killed not only from my target. (Quest item rate 100%)

[Yera]

You might not get it because you one hit others mate. Other than that - you should get the right amount.

[Eselter]

No. Only I hit mobs.

Q: Collector's Dream, Skill: Flame Strike.