Rest of enemies not spawning in "Wanted: Loose Raptidon Wrangler"

[WumboJumbo]

Went down the elevator, opened the big door, and killed about 4 raptidons and 1 mantisaur.

From watching different videos in YT of this quest, there should have been more enemies that spawn after you kill the initial wave. But in my instance, the quest marker in the area does not go away, and the objectives do not update.

Notables:
- After clearing the initial wave, there is a single red enemy awareness indicator in the area that is pointing in the general direction of the quest marker.

- If I leave the room and re-enter, there is a exclamation indicating I've been spotted by something and my companions enter combat but disengages after a few seconds.

- I initially brought Inez and Aza, but tried it solo, and with different companions to no avail.

- I thought it might have been a raptidon in stealth, but I blasted every inch of that chamber with grenades and nothing got hit but my squad.

- Tried to go back to the quest giver, but the dialogue did not update.

I thought about trying to redo entering the Undisputed Claim for the first time to see if it'll reset everything, but I did Tristan's quest after landing in the Undisputed Claim, so I'd prefer if I don't lose the progress.

Any help would be appreciated.