I've already submitted an official ticket for this, but I just wanted to see how many other people were experiencing this. I completed all Level 1 challenges for Auto Cannons earlier and received the trophy for it. About 2-3 hours later I completed all the Level 1 challenges for Grenade Launchers but didn't receive the trophy.
I am hoping to get some traction with this as this really stinks for all trophy/achievement hunters. Also, the more this gets some visibility the more EA will be inclined to put this at the top of their list to fix, hopefully.
Same for me. All weapon challange unlocked a trophy but the granede launchers. I also opened a ticked for this few days ago but have received no answer.
That stinks you haven't gotten a reply. I know that many trophy sites such as Power Pyx have noted that this is a bug, so it should be on their radar to fix. I really hope this gets patched soon.
I've tried everything I can come up with to resolve the issue without any luck. Deleted and reinstalled the game, tried it on an other PS4. Created a new pilot. Did all light machine gun challenges from one to three completely with every weapon in there even the masterworked ones even though they just have one step. Nothing helped.