Inner guardians and conjurers

Shouldn't the archons/angels/devils get attacked by Inner guardians when conjurers raid? Just experienced one where the devil did not get attacked, hence when I did an area affect, it was focused on me. I've run into similar problems with archons. There's likely some balance issue involved here that I don't know of since I've never played a conjurer, but thought I'd bring it up in case it was a bug and you weren't aware of it.