My friend and I have tried to play complex 13.4 multiple times now but every time we get into late game we get the de-sync bug where he gets kicked from the game. We've tried everything from having him play on the lowest graphics settings possible along with myself + low unit cap. The last time we tried we only fought a 2v2 vs ai and it still happened 30 min into the game roughly. Going back to 9.1 for now because that seems to work for us even with graphics and unit cap set high.