Gambit/Malfeasance Quest - DONT USE SLEEPER (Destiny)
Credit to reddit: https://www.reddit.com/r/DestinyTheGame/comments/9jisku/ascendant_in_gambit_only_spawns_if_your_team/?st=JMLYV25V&...
Looks like if anyone has Sleeper Simulant equipped you will not get the spawn. But the Spawn rates are very good if you do not. Reports of 3/5 matches spawning the needed Primeval.
Well played Bungie.