The Drunken Lizard Pub

So I killed an npc and the lootbag is behind a wall where I can't see it.
And it's quest loot so I can't progress without getting it.
Why is there no transparent wall setting?

With enough cartography skill, the bag is marked pink on your map.
Don't be afraid, it stays on the map until you loot it. So you may come back, when you're better in carthography.
You can also search with the mouse. When you're on the bag it lits up.