is it disconnecting from like a foul or offside? if so... i hope this helps
im not sure exactly why, but... for me the fix has been: loading the game up and going into the game settings into graphics settings to change quality of the game (PC) and pressing the button to restore default settings (the game puts everything on auto) press confirm, and then i close the game and start it back up... has allowed me to play in rush and not disconnect on a foul or offside... (not tested any other mode)
i dont want the game to choose my settings, but if it makes it work for now... well
sorry if this doesnt help!