Shen does negative damage in after game screen

After a 5 man ranked game, I proceeded to check the statistics to see how I did in comparison to my team and the enemy team. As shown in the link, the Shen (Me) did -2147483.6k damage during the game. I am not sure how or why this even happened, nor if this is even the first instance of this but I was shocked. I am not sure if it was the combination of items, or the champions that were chosen, but it still happened nonetheless. I hope this actually amounts to something instead of just being a waste of time to read.