New Trial Chamber Encounter Room Not Generating

I have been to about 15 different trial chambers in the preview. Not a single one had this new encounter room. Don't know if its a bug or no but either way it really doesn't generate enough for such a cool feature. So i'm still yet to see this new room in-game. I dont think there is enough room for it to generate in corridors with all the other rooms jammed in around the chamber.