@Buhmann @joinski The netplay works more or less depending on your connection and other factors.
I put you a link to a netplay guide and also a list of netplay compatible games.
https://github.com/recalbox/recalbox-os/wiki/Mini-How-To-(EN)
The list of compatible games is under construction.
Do you use no-intro roms?
If you want I can help you solve your problem on the recalbox discord.
https://discord.gg/gEfU9JR