Situation 1 Player walks onto trap Monster is in the way of the trap, blocking the player Monster takes damage Situation 2 Monster walks onto trap Player is in the way of the trap, blocking the monster Monster takes damage anyway Is this intentional or is it a bug?
I would imagine Situation 1 is intentional, but not Situation 2... I've had situations where a monster walks on to the trap and I'm between the monster and the arrow source; the monster still gets hit somehow.
I always thought it was intentional. It'd suck to get acid bolted to death because you're stuck in a corridor and the monsters keep stepping on the trap, but when they're in front of the trap, you get to make strategic use of your environment.
