I'm not sure if this is a bug or a glitch but correct me if I'm wrong here. In the spike room at sardon they added a new spike by the door that leads to the flag room to prevent people from blocking the door as easily. Just recently, I've seen people run down low enough where the spike will not hit them but they're on the tile that should warp them into flag room. Even if you're arrowed down you cannot get low enough to block that door without taking damage from the spikes if I recall correctly. I'll see if I can record it because I see people enter and exit that entrance a bunch of times until it seems to let them run straight down without entering the flag room and then can block without touching the spikes.