Same thing happened to me last season in the CL game, though we still won that match... In the 77th minute it was 4:1 for our side... After a few in-game minutes and without an end-game screen I was returned to the main menu (android app)... So I went back to check the final result and players ratings and saw that the final result was 3:1 for us...

So, our legal representatives immediately sent an protest note to the FA and asked an explanation from them, and in the letter that we got from them we were told that the goal was disallowed because the new goal-line technology said that the ball didn't pass the line, that it was referee's mistake that no one knew that it was disallowed, and that the Association has already took the steps in determing the consequences for referee's actions...

Joking aside, if it was an important match for you I suppose you should report that to the Nordeus support...