Aaron Thiery mission: "Find and defeat Arachnos Commanders" low spawn

[RikOz]

The relevant mobs for the Atlas Park mission, "Find and defeat Arachnos Commanders" - the second mission from Aaron Thiery - spawn at a ridiculously low rate. I've seen this every time I've done this mission arc. Right now, I'm the only hero in the appropriate area, and only one group of mobs has spawned.

[srmalloy]

Sometimes the game doesn't register that you've entered the area where the 'open-world instance' is set; the consensus seems to be that you move to another area (the blue dots on the map defining neighborhoods) or zone out and back. I've had times when it was like pulling teeth to find Arachnos commanders, and other times when they've respawned so fast that I have to be careful to avoid pulling in a second spawn.

[RikOz]

I've done what you suggest, multiple times on multiple characters. Leave, come back, still no mobs. Sometimes there are other players there, all doing the same thing I'm doing: standing around wondering where the mobs are.