Stuck in combat due to an unreachable enemy. "No line of fire"


I just cleared out the area “Gave of the Ancients” however a Mimer drone is up in a building i cant reach. It’s a 2 story building however its on the 3rd “level” sitting in the air. During the fight it couldnt reach me so it just went in to Overwatch. After killing everything else I got close to the building however no matter where i go, i have No line of fire. Even flying up in the air right next to it with Dux.
I really don’t want to have to go through that fight again as it was a pain lol.
Can anything be done?