Twice now I've tried to get through the zone invised to get to where the hotzone quest mobs are (all the way up at the top) and I've had these wolves see through invis and aggro causing a bit of a pile-up as roaming giants joined the fight. The first time I thought maybe invis broke but the second I stopped and conned the wolf just before it pathed into range to aggro. Sure enough it could see me.
Having run right past master trackers and their wolf buddies plenty of times in the past this really threw me for a loop initially. Not exactly a lot of room on some of those paths to get around these mobs.