Hi there, Ghostborn A3 can't be resisted but on the first screen you probably got a weak hit on both the target cause a green attacker had a 35% chance to place a weak hit and miss any crit or debuff.
For the second hit, are you sure you didn't have put the CC and then it got cleared by a mastery? There's a defensive mastery called "resurgent" that have a 50% chance to clear a crowd control when a champion lost 25% hp or more from a single attack, and Skullcrown is already at 60% hp left, so that attack can made this mastery trigger.
I wrote that because lot of people in my clan use Ghostborn and no one had this bug.