Loot dissapears when using spiritspeak.

[OldManAlewar]

all loot, except clothes, dissapears when you spiritspeak a corpse of the Black Order ninja's & mages.

this includes (including but not exclusively) : gold, peerless keys (lit. in this case) weapon / armor loot.

this happens regardless of whether or not you have the corpse open; but if you do, you can witness the dissapearance.