When Looting, Despawns and a New Spawn Appears in Location Current Spawn Came From?

[Riklin]

I'm experiencing a weird issue that I have absolutely no idea how to fix or even what to look at. A mob is pulled, then killed. The corpse is immediately opened, showing items, but before any looting can be done, the corpse dissolves and another mob has spawned back in the location where the mob was pulled from.

How is this happening and how do I fix it?

The server is a linux server on a reliable hardware that was created via Akka's installer and all I've added a few merchants, but that's about it...