There appears to be an issue with summoned familiars, particularly the shadow wisp, not disappearing after the caster (necromancy) has logged off. Spotted two, 1 at the NPC tailor and 1 at the crafting hall that both belonged to two separate players who were not logged on at the time.
And I heard a voice say, "Whom shall I send, and who will go for us?", and I said "Here I am. Send me"