Broken fomor robe?

I'm currently in the middle of trying to do G3 infiltration, however, I'm having issues getting by the mobs.

All of the 'tips' given in the main article say that all mobs other than the hellhound shouldn't be able to detect you when you have the fomor robe on, while the hellhounds detect you instantly. I've been experiencing quite the opposite. Whenever I spawn normal mobs, they aggro me instantly from half way across the room, however, when I spawn the hellhound it doesn't ever aggro me. I've tried it without the robe as well, and it gives the same result.

Is it style tabbed...? I did Infiltration last night and it was working fine.

Discovered soon after posting that unequipping and equipping the robe fixes this issue.

Does it??? When I did it, it never worked. Even wasted 12 pons for a style tab key. Still didn't work. Ended up having to just fight my way through it.

You need to do it when you're inside of the dungeon.

Oh. well that explains everything. :C