Im having a weird bug where entering combat in the underdark also adds a bunch of gith enemies in another place on the surface map to the combat. They seem intent on reaching me but just spend their turns dashing around. Whenever the enemies I fight in the underdark are dead they drop out of combat, but when another combat starts they are pulled back into the turn order in the same manner.

(Its a group of gith near a bridge. I have briefly been in a combat with them previously but fled after trying to steal a weapon from one of them.) Has anyone else encountered this? Its nothing gamebreaking, but does waste time every combat.)