Rogue Exiles in Essences Stuck and Pausing Abyss

Rogue exiles will appear out in the open, nowhere near an essence, and be unkillable until their essence is found. When activated, they spawn where they were originally, and not from the location of the essence.

If this mob counts for the abyss to move forward, the abyss will pause until you go and find the essence rogue exile, go back to where you found it outside of the essence, and kill it.