City Square, Blight pathing into unreachable terrain.

https://imgur.com/N0kBt8a

Inside of a City Square (T15), one of the paths for the Blight encounter leads in between two of the shields (terrain) on the map. The mobs spawned from the portal can get stuck in between these two shields, and probably others as well, rendering them untargetable and unkillable, even tried placing a Meteor tower but they seem completely untargetable and will therefore not end the encounter.