Enemies have increased "primed for stun threshold" while in a party.

While in a party, white mobs aren't primed for stun until their stagger bar is at 60%.

I’m getting no “primed for stun” on any mobs except for rare and bosses, even with stun threshold bar completely full on Mobs that survive initial Leap Slam. I don’t have “crushing impacts” selected either in Titan Ascendancy, as I know that removes primed for stun nodes.