Personally I don't see how that is a bug? How many games irl have you watched where the referee has allowed more than the allocated injury time? I remember as a child watching Darlington v Solihull in FA Cup and Uriah Rennie (****) played 12 mins of injury time, resulting in Solihull scoring an equaliser with last kick of the game! It's part and parcel of football, it's not set in stone and is up to the referee to play how many minutes he see's fit...