That happen to me a couple times. But only when i watch the game on my phone.
I was warching a game and saw i was winning 2-0. So i left and come back a few mins after and it said 5-0. At the end it was 3-0.
Another time did the same thing winning 3-0 left. Come back it said 5-0 at 75thmins . I saw the comment and they were repeat ones. Comment would stop at 50thmins and then start again in 1min.
Check ur game comment when that happen. And u will see what im talking about. Only if u are playing in ur phone.