The Gromp Jungle Camp has an annoying glitch

I'd first like to say this in no way involved an enemy champion and 2 other people I play with have confirmed it happening to them as well. So here's the glitch. Sometimes (very rarely though) while doing gromp at level 1 right as they finish doing it gromp dies normally but the Gold and over 60% of the XP is stolen by something that's not there, and the green trail that rewards people with a small amount of HP flies towards the Tier 2 tower bush. It's not horrible and me and my friends have even made a joke of it calling it casper the a**hole ghost but it has become a bit of a problem as a few games when playing horrible early junglers it would screw me over as after doing grump I wouldn't even beable to hit 2 and I was already like half HP making me have to back right after blue and wolves.

To the people who think this simply might involve someone stealing it the green trail ALWAYS flies towards the bush and I've taken up the habit of warding that particular bush and not 1 single time was there ever an enemy champion in that bush or anywhere in the area.