Multiple Controls not Working (Moonlight)

I’ve searched for a while for this, but can’t find a solution anywhere. I’m streaming to Steam from my Raspberry Pi and when I launch Retroarch from my Steam library, only one controller is detected. In all other games, all other controllers are detected. Is there any reason why only Retroarch would only detect one controller? Any help is greatly appreciated.

P.S. I do have RetroPie on the Raspberry Pi, but I want to stream N64 games from my desktop running Retroarch because they don’t run well on Raspberry Pi.