Infiltrators arrow mechanics.
There may be work that needs doing, but it’s a persistent problem across all teleport skills. Generally, if you don’t have line of sight and can’t walk to it directly without jumping then you won’t be able to teleport there.
all is vain
This is a problem that affects almost all teleportation skills. Essentially, after you pick a spot to teleport to the game will try to find a path to that spot so it can make your character travel along that path at very high speeds. If no path is found you’ll simply teleport to the closest spot to your target (the edge of a platform or the bottom of stairs). The problem is sometimes the pathing algorithm finds a path to the target that it shouldn’t have been able to find (teleporting through gates and walls) and other times it doesn’t find a path when it should be able to (teleporting to the bottom of the stairs or at the start of a bridge instead of on top of it).
Fort Aspenwood
First it looks for a path from start to finish. If no path is found, you go nowhere. If a path is found, then it checks the line connecting start to finish for collisions with obstacles. If there is a collision, it puts you at the point of the closest collision.
Sometimes, the pathfinding check fails even when there is a valid path. This is most likely because there is a limit to the length of paths that will be checked, in order to keep the processing requirements within reason.