This information is probably available somewhere but I cannot seem to find it. Is there any explanation as to why my Voidwalker does not hold aggro against legacy raid bosses when I am affliction or destro but DOES hold aggro when I am demo? And yes, I know the taunt and presence is turned off automatically when entering raid zone/summoning new demon etc. and I make sure to turn it back on in this situation.
To test, I was in the emerald nightmare on the first boss and as affliction or destro, the voidwalker would never hold aggro. When I switched to demo, the voidwalker would hold aggro just fine no matter how much I dps'd to try and pull it off (I used voidwalker instead of felguard on my demo to keep it consistent).
Any information would be greatly appreciated. I just want to make sure I am not crazy, I am sure I am missing something glaringly obvious but I cannot see what that is. Thank you in advance for anything helpful.