So I noticed that if you put a fire down somewhere thats on a steep hill or next to a steep rock that while you will be beside the fire, since your height is higher, the fire won't effect you despite you seemingly being in range due to you being too high above the fire, yet still close enough that you should be able to get its effects.

Seems to be directional based upon the angle of it being placed, so if you place it on a corner and its pointed at the ground, you won't be able to use it since your not on the same height level as it.

I'm sure this is not as intended so I figured I'd report it as a bug.