I recently tried changing part three of one of my arc's to be a simple Rescue Captive task, nothing else. When I went to test it (live, not through the test feature) -- I got "Mission Complete" immediately on entering along with the Mission complete clue; there were absolutely no enemies on the entire map. The captive was there and correct, and I could find him -- whereupon he ran for the door.
I thought this might be file corruption or something, so I tried a brand new arc. Same exact behavior. When I added a "defeat boss" task, presto -- enemies. Is this something everybody else knows about? Is it a "feature"?
Switched to the Council and suddenly everything works. Thanks for the info!