Skyfall vs summoned wizard 1.8

Noticed something funny with skyfall maps that makes me not hate skyfall with a passion anymore. As a summoner wizard with spiritmancer set I always have 7-10 minions hanging around me. If a skyfall ‘hits’ a minion it fizzles. No explosion and no damage to myself or minions in the would be radius. As long as I keep inside my group of minions skyfall does no damage anymore.