Unique Breach Precursor Tablet, Breach not closing

I ran a Breach with the the unique modifiers that make the Breach only close when all monsters are dead. I ran around all the area where there is Breach Area but I can't find the last monster.



EDIT:
nvm, was just on the other side of the map, over the chasm.

Glad it was t a bug and was just a monster that was over looked. Ide advise you delete this post to save time for the moderators where they don't have to look into your post and see at the bottom that it was just a player oversight.