How exactly does guard assist work?

[Faerie Blossom]

I was sitting in RV bank as I so often do, and Punkin was attacking me as she so often does. Dispelled her dots, then was nuked so ran to guards in front of bank. She got 2 more nukes off on me and the lame guards just stood around like they didn't care.

Did they patch in faction for the guard assist thing, or was this a bug? If the RV guards have abandoned me, I'm just certain I'll lose my entire savings to FoH :P