Tried to use weapons from dlc - maverick and maverick A2(87 and 89), they can be used but i can't attach modules or camo to them. When you are enter the game modules are reset.
And the same story with secondary weapon, tried to set assault rifle instead a pistol and after connecting to lobby it reseted to 0
1444E7FE0 - secondary weapon for 1st loadout of 1st squad member.
It looks like situation with patches