Erros universais do controlador de tela dividida?

[exeoe4]

I’m trying to play tmodloader with my little bro, and I got ahold of the universal split screen. I’m using keyboard+mouse and he’s using a wireless xbox one controller. While my keyboard and mouse functions properly, his controller controls both of our screens. I’m set to “No Controller” and he’s set to controller input 1. Any solutions?