I noticed it too.
And maybe there's another thing: the highlights 0'-80' are longer, like the ball starts on goalkeeper, goes to the left, to the right, to the middle, defender saves it, and then it ends in a counter attack. lol
80'-90' highlights are shorter, like the player gets the ball and does a direct shot to the goal.
I think they do it because the match has a limit of real time (maybe 8' or 9', dunno)