Unable to reach some monster drops

Sometimes a monster will drop loot in a place we're unable to pick up. Below is an example after defeating boss Horseman. Another example is loot on a path right on the edge of a map, as standing on the edge will immediately take you to another map.

 

I've seen this as well, in the Minotaur's Layer, when he pops up behind you and you have your back to a pillar. I can see two possible solutions.
1.) Add a command to pick up items in front of you(similar to mining/fishing... etc) Though I think this would be impractical as it would change a LOT about the game.
2.) Add a "invalid location" routine to NPC AI, preventing them from going places that players can't.

I definately understand the frustration, some people are barely able to kill something, and then you can't get your reward. Or like me, OCD insists on picking EVERYTHING up. I know the OCD isn't the dev's fault, but it's forced me to take an 'extended break' a few times...