I ran this yesterday, and almost failed. I tried zoning out, swapping the characters he was following, and killing even more mobs even though I'm at the exit. I think this may have finally triggered a success behind one of the rocks. Here is a video of me running Basher over the zone out, over, and over again. I almost failed this mission through no fault of my own. Anyone else have a similar experience with this rescue?
Yes. Had this issue on phinny multiple times. I think the success location was in between one of those boulders, so I would just run over the rocks and eventually got it.