I doubt it is internet related. My game constantly crashes in offline franchise mode. Unfortunately, I bought a physical copy of the game and Target doesn't accept returns of open games. I'm just patiently waiting for the class action lawsuit to be filed.
I'm just speaking from my experience on Xbox one franchise mode when I turn vibration off it doesn't freeze but if you hard reset for any reason you have to turn vibrate off again to avoid freezing again madden19 can't speak for 18or20