Hextech Infinity Edge Bug

Just discovered this interaction when I randomly decided to throw two Infinity Edges on a Brand for the hell of it. Steps to create:

Put two infinity edges on a character: +50 critical damage base + 200 critical damage bonus + 200 critical damage bonus

Character is hit by Hextech Bomb leading to a total of -50 critical damage (Lower than base)

After Hextech Bomb wears off your character only returns to +350 critical damage bonus causing a loss of +100 critical damage