Game Mechanics: Sebilis NG Agro Issue

[Hailto]

So this happened to me twice tonight and I'm not really sure what is going on. I was in NG, well across the bridge both times and got agro from the mobs on the other side of the bridge randomly. This happened to me once while i was killing a scarab and another time when I was afk after getting a rez at NG. There were several other people who witnessed it happen the second time, they said all the mobs randomly agroed me and ran straight for me and killed them in the process as well. I wasn't even at my computer, i was sitting in the safe spot not moving and they agroed. Any idea what is causing this?