Friend o' the Forest, Indeed
Fighting Ivern in the Jungle is a bad idea.
Especially if you have any form of AOE or pass through skill shot that may damage a nearby jungle camp.
Part of his passive states that JUNGLE MONSTERS WILL NOT ATTACK HIM
So that means, even if he is closer to them when they get aggro'd, ... THEY'RE AFTER YOU, PERIOD.
I'm not going to say that this is broken. I actually think it is quite amusing.
Just something to be aware of.