Currently stuck doing Bandit Slaughter. ****ing game gets to wave 1 of round 1 every damn time and stops spawning enemies, forcing me to quit and start over. I hope to god this quest isn't mandatory to move forward.
Some people said you might have to level or advance other quests to fix that spawn bug. Not sure if that's a real solution or not but I'd just shelve that side mission for now if it keeps bugging in the same spot.
edit: The goliaths might be it too but I purposely headshotted them and had them fight in all the rounds/waves and never ran into that problem so IDK