Imperial Troopers not counting toward Journey / Anniversary Quest

So I'm at the Journey/Anniversary Quest that says, "Defeat 50 Imperial Troopers with Mon Mothma Present." I fought LS 6-C, which has about 10 stormtroopers, plus DV at the end. I used Mon Mothma, Jyn, K2, Cassian, Bistan, and an ally Princess Leia. 

At the end, I was credited with only 1 defeated Imperial Trooper toward the quest. 

CG, if you're going to make quests about defeating X units of Y faction, this needs to work intuitively. I don't know if the "campaigns" PvE enemies don't have proper faction tags (at least 1 did?) or if something else is broken. 

Please fix this, at least for the future. I have no idea now what PvE enemies will count and what won't.