I remember it being a DT in era so I found that confusing as well. In open world if you pull anything other than TVX out of their set area and they have you in line of sight the boss will DT you it's a no cooldown DT so they'll rapidly DT everyone else on aggro list shortly after if they're in LoS.
If you guys are clearing all the non-AHR mobs one day then splitting AHR 2.5 days later this change likely won't affect your AHR splits, but it may affect the order you can do your clears. It's been 16+ years since I did in era VT but I remember the warders are in AHR's room but also in Diabo rooms and the ones in the Diabo rooms can't be there when you fight the Diabos either so you have to do certain bosses in certain order to deactivate the warders.