Logged on, went to find some skeletons near NT... no mobs anywhere.
Got hit for 160-ish damage out of the blue with nothing in my chatlog saying why, healed back up (this almost killed me) and spammed cycle/select nearest enemy for 5min, nothing.
Sat near the Ruined Homestead at New Tris... quest NPCs are there, mobs are not.
Other players are reporting getting hit by attacks while gathering, and such.