TrinityCore/TrinityCore — comment on commit bed3fb6d98e6c43c8588318e6baa8c4433da80ac
File:  line 0
By Muzashi:

That's right. If it's something when the creature dies "normally" (like killing it, or using commands .die and .damage) it respawns on its original position.
Hope someone can take a look at these little detail