Ivern Post game statistic total damage problems

Occasionally when I'm playing with in my game, on the stat screen after the game ends his max damage reads to be 100's of thousands of damage in a very short amount of time. I look at the "Damage Dealt" tab and for example it will say 260,000 damage. Then I'll look at magic damage and physical damage and it will more often than not be less than 15,000. It is not a game breaking bug but it would be nice if it were fixed. Because personally I'd like to know my total damage though I don't play . Thanks RIOT!