poison dart traps not doing any damage?

how do i fix this?

i have the same issue! when i place a poison trap on wall, it not deal any dammage to player, but if i reduce the thickness of the wall it work! any help?

building deathruns in UEFN is a no go because you have to use the the engine to single handedly place the traps down for them to work and not mess up, such as dart traps doing no damage or spike traps deleting themselves. deathruns have hundreds or thousands of traps im not ever doing that again