Solitary confinement door does jack shit to protect people

[BaneOfGiygas]

I was the Captain and I brigged this fellow who had a chainsaw arm. He was up against the glass door, and I was to his immediate southeast. Somehow, he was able to chainsaw me through the glass door to death, basically cutting through the corner of the wall. I'm not sure if this is specific to chainsaw arms or if it can be replicated with any item, but this makes absolutely no damn sense and should be fixed. Getting chainsawed through solid, reinforced wall is not a very plausible way to die.