2 Fantec Pro DD wheels I cannot both to force feedback in split screen

Hoping for some help! I have two Fanatec DD Pro wheels and the 8nm feedback but I can't get them to work together in multiplayer / split screen. Force feedback and lights only work for player 1. Player 2 can drive but no lights or feedback to the wheel Both units work perfectly in single player, the drivers are up to date and everything tests normally on the Fanatec site. Any help would be appreciated.