Ivern's damage seems too high in post-game recap

I've consistently seen Ivern with by far the most damage dealt (not to champions, just in general). I normally just assumed it was because he gets to clear his jungle for almost free so he just does so much more damage to jungle monsters. My last game though, I checked afterwards that he only killed 49 neutral jungle monsters in the whole game. Meanwhile my allied jungler had killed 86. Ivern had 257k damage dealt (246k of which was true), with my jungler at a mere 118k despite nearly double the jungle farm (and our 6/0/4 Jinx at 115K and me as 8/0/5 at 112k).

Like basically, Ivern and his whole team were way behind, we were all fed, and he still dealt more than twice as much damage on the map compared to anyone else.

Pretty sure there's a bug here. He's getting granted 3x the damage on the camps he takes or something...

Put differently, if all 49 of those jungle monsters were Gromp he'd have gotten only 110k damage off of clearing 49 level 10 gromps (and there's no way their average level was 10 when Ivern was only level 10 at the end of the game...). That's less than the amount of damage he dealt more than any one of us and would be all of his jungle creeps.

They did take 1 dragon. Even that wouldn't get anywhere close to making up the damage though.

I can't think of anything to explain that amount of true damage dealt unless his passive is really overcounting it. Maybe it's applying the damage of the whole camp to each monster in the camp? So instead of doing 3000 damage to clear raptors he gets 3000 damage x6? That might get somewhere in the ballpark? Especially Krugs applying 17x damage.