Throwing Slade Bomb Up While Next To Kragg Whiffs Kragg and Damages Slade#704

If Slade throws bomb straight up while standing right next to Kragg the bomb blows up and hits Slade and completely whiffs Kragg

I’m confused… what triggers the explosion then? Is it detecting but not reaching?

I think the detection hitbox sees the part of Kragg’s horn but his actual hurtbox is not in the explosion radius