Game Mechanics: Lich form, bond of death and DoT's breaking invis

[Minluan]

Observed these playing my necro today:
I am unable to stay invis whilst in lich form, each tick of lich will break my invis.
Also when I have casted a bond of death on a mob, invis is constantly broken in the same manner. Even when the mob has died and the health gaining part of the spell is still in effect.
Casting a small DoT on myself and attempting to invis also has the same outcome, I am unable to invis.
This did not happen before the 15 July patch, and wondered if it is working as intended?