We are experiencing similar problem on wireless LAN. It lags after resume if you travel via Starforce. Then it seems to hang midair upon landing for clients, they cannot disembark. If they manage to get out, host+his AI is not moving/lagging like hell (20-30sec lags)
ping=9ms, desync=0, bandwidth=350 (strange isnt it ?)
BUT - after save&exit and resume it stops lagging until next heliflight ! It seems like it gets all wrong when your travel fast (chopper)