Boom boom boomtown issue

Im on the above mission. Current objective is to clear COV invaders. Its up where the vending machines are. Ive killed all invaders. Restarted game and killed them again. Mission will not progress. It says kill invaders but theres nobody left to kill. Ive even tryed fast traveling and coming back, and talked to everyone. They tell me to complete mission.
Am i missing something or is the quest bugged?

Never mind. Restarted game again and it worked.