I have exactly the same issue; it's incredibly annoying.
My Rapid Fire 1 challenge automatically completed when EA released the patch which lowered the challenge completion requirements. However, I haven't received the Kord. My current challenge wants me to use the Kord to progress, but I can't because it's locked! I have the same issue with the Assault spawn beacon. So in other words, my Assault class progression is completely bricked....
I have reinstalled the multiplayer, updated to the new patch today and played quite a few matches today, and the locked weapons/items are still locked.
Please fix this!
