Netplay help plz - can only watch as 2nd player

Hi there. I was trying to play with a friend using the Netplay function in retroarch 1.7.5 stable on Windows 10.

We forwarded the default port for Upnp and TCP/IP in the host computer, and then i successfully connected to him as player 2 but I can only watch. We also checked that the spectator options are disabled.

We can play using the “server in the middle” option but we are both playing in Chile, so the ping gets too high in that way.

Am I missing something?

Thanks.