I'm in a level 40 Antiquarian swamp realm, and came upon a section on the map where the floor is missing under the shallow water. It's basically a bottomless pit where I'm sinking further below the map till I die, or if I try to get to a ledge or something to use to climb out of it I'm unable to and then I die. My follower NPC followed trying to revive me and they did not reappear when I respawned. I had to load back into my respite point for her to reappear.
