Larian Studios Forums Divinity - Original Sin Divinity Original Sin - Help/Tips/Tricks White Witch Cabin - passive immaculate summoner

I am not sure if itｴs a bug or a feature:

When I remove the barrier around the white witch cabin I normally destroy the mushrooms. This time I did it with the barrier removal spell out of curiosity.

And while before always just before entering the cabin the immaculate summoner showed up himself for a last fight, this time he was in the cabin, totally passive, and was beaten to death without a single move on his side.

Now - is that a bug or a feature?

Regards,
Thorsten