Delirium + Zahmir Boss room

If you got a running delirium event in your map and you are entering (but not encountering yet) the boss room of Zahmir, the blade sovereign you get a nice double penetration.
One from being hit by delirium mobs but being unable to fight back.
The other one from being slowed and not being able to move out fast.

Not really sure if this is a real bug but probably a situation the map designer hasn't thought about.