Psykers Shutdown by Fences

Why can’t psykers aim powers through fences? We can shoot bolts and get shot through fences, but esp. in chasm station the chainlink fence there stopps BB and surge staff from targeting. I’ve experienced this a few other times where small railings or fences completely block the targeting of powers. It would just be annoying if BB wasn’t the only consistent way for psykers to deal with snipers. Headglitching snipers nailing me, invincible because BB decided a railing was a solid wall is aggrivating. Surge staff similarly can’t attack enemies with any sort of elevation difference outside of a few feet. I realize this was probably due to issues with the lightning clipping, but it massively reduces the usefulness of the psykers main tool for dealing with hordes of ranged enemies.