Can't pick up Firesand in Copperbell Mines

Time: 3:30pm JST
Frequency: Once (Didn't try again)
World name: Balmung (in a cross-server instance)
Character name: Makono Makan
Monster name: Blasting Cap
Class/Level: Gladiator 18
Party or solo: Party
Area and coordinates: Copperbell Mines B2

Steps:
1. Kill a Blasting Cap
2. Firesand drops
3. None of us in the party could target it or pick it up.

It's possible that it's because it dropped right on this door and the game may think it's under it.

http://i.imgur.com/YTKIBXm.jpg

-=-=-=-=-=-=- System Information -=-=-=-=-=-=-

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