Tab screen is showing wrong information

I dont have any Pic of it but i had noticed in my last game their jungler had 3 farm 15 min in game ( he had items and did not dc at all during the game) and than shortly after at the 27 min mark (after i had seen him farm large minion waves and jungle camps) he had 17 farm than around the 29 min mark i pressed tab again and his farm jumped up to 93. Think there is something wrong with the tab champion screen