Game Mechanics: Rogue sneak hide or just sebilis broken

[Amuck]

I am constantly conning mobs and sneak/hide by them just fine, now when i sneak hide past the same mobs they are attacking me, i have died countless times to dragging corpses helping other players, also other member in seb invising passed mobs conning indiff, then running again with invis still up being hit. Wondering if this is something broken or what the case is. very weird.