Story Missions no longer work for trophies

[HotdogWithAPulse 0]

I heard reports that Weapon Of Choice could be unlocked via Mission 3. I played the mission 6 times getting a good 20 kills per game. The trophy never popped. I have gotten several legendary weapon kills in multiplayer matches prior as well. I think they stopped story mission trophies in the patch that stopped private lobby trophies. 
 

Just putting it out there because playing the story missions was a huge waste of time for me.