i have often found the game engine will freeze if i do a sub that perhaps the game AI didn't expect to me its recalculating how to change the result i once did a GK sub and it froze for 3 to 4 mins in real time i thought it had crashed but no when it restarted the oppo side didnt even resemble the same one i was playing against just a few mins before passing with ease and then went on and scored 4 goals to win the game although the match had no meaning in the context of league i was just experimenting to see what would happen it was a shock just to see the game engine freeze in such a way and come back like it did