enemy stuck in the wall

At the start of the game there is a mission to kill every enemy in FEtid Pool unfortunetly one of them got stuck in the wall and im unable to kill him and complete quest

Happens a lot with the new mechanic and has not been addressed yet. The workaround is to either wait 10-15 minutes for the instance to reset or you can ctrl click the entrance to Fetid Pool and force create a new instance and hope it doesn't do it again.

^^ No need to wait for, you can always force to create a new instance by Ctrl-Click on the Entrance or the Waypoint of the desired area.