As soon as Baliath is pulled he drops through the world..no matter what direction or method we use to pull him. He then resets. Mob is unkillable atm and zone is unable to be progressed past him considering the bug.
It's a known issue. Been going on since late afternoon/early evening Friday. Other mobs are affected as well, Baliath is the worst though. No ETA on a fix unfortunately.
This should be fixed within the next hour or so. No patch required. You may need to let your saved zones spin down then reenter for it to take affect.