In some dungeons, monsters will enter the main path by climbing up or down walls, jumping off cliffs, and so on, to enter the main path where the player is.
Some of them can be killed while they're still not on a path where the player can walk:
What happens to any items those monsters might drop, when I kill them while they're still off the main path? Do the items simply disappear (meaning I should avoid killing them until they fully arrive)?