Does anyone know why the ??? for Ix'aern (Monk) in Grand Palace of Hu'xzoi doesn't show up?

Is it broken atm? Or does it not respawn after the 15 minute cooldown.

_________________

Did a few about a month ago, worked fine. There are 2 spots where the ??? can spawn, if it's not on one side check the other. If none of them are up, check the zone if somebody is fighting it.
There's a bug that can sometimes happen where once you kill Ix Mnk and try to pop it again, it just doesn't pop, have to wait for the ??? to reappear again.

After fighting about a dozen ix'mnk, we've noticed that when you spawn him, two things may occur:

1) the ??? doesn't disappear immediately; it's going to move to the other side 15m and 15s after TOD.
2) the ??? disappears; it will reappear in the same spot 15m 15s after TOD.


This has been my experience 100% of the time so far and has helped save a few minutes running around knowing where it's going to spawn next.