1.) It will not leach suppression from the void hunter supers Mobius Quiver or Deadfall. It will leach weakness and volatile just fine, but the suppression node remains empty when shooting an enemy effected by either super. 2.) If you get hit by your own suppression grenade with suppression leached it will unleach suppression from the gun. 3.) Finally, if you activate Mobius Quiver and immediately throw your suppression grenade afterwards, it will unleach suppression from the gun as soon as the grenade detonates. I saw this happen before with Deadfall but I haven't seen it since the recent patch.