i was recently trying to play online with a friend of mine on PCSX2 netplay build. We connected and played well for a short time without any lag whatsoever. like we were sitting in the same room. But almost every time it crashed in the middle giving an error message saying "netplay: timeout (certain number of) frames. we tried 2 games only that is capcom vs snk 2 and street fighter ex3 and both gave us this issue sometime later during our session.