"After defeating the Snowfield Slayers, Complete Crystallite Ingots will occasionally drop where they spawn."

I checked this when I got stuck mobs on my giant. The Complete Crytsalite Ingots dont spawn where enemies died. They just spawn a set distance from your char and dont poof. I finished the mission with about 50 seconds left after the next ingot spawned, and it completed successfully with 30 extra ingots, which I was then able to pick up all of.

Where the ingots spawn looks to be roughly 3 steps away, so roughly half the width of the street in dunbar between the healer house and the blacksmith shop. Idk how many "meters" that translates to, roughly 10 I would guess

I think it's referring to the general area where the slayers spawn, since they appear around you?

Did the event on my elf next, this screenshot of the place they dropped, shows pretty clearly that the ores drop in a circle, the slayers spawned all over the place, died all over the place, and were rarely in that circle.

EDIT: After doing the event a few more times, it looks like they just spawn in a circle around where you start in the mission.

If the wording bothers you that much you could always edit it.

I wanted to make sure I knew how it actually occurs first.