[Gameplay] Jungle Minions and Runes bugged

In the recent patch, jungle minions were modified to not give 1:1 CS per kill in order to not favour junglers that prefer bird camp and krugs over gromp and wolves. However, when I went into game with the overgrowth mastery and killed both buff monsters (8 to my creep score) I didn't receive a stack of overgrowth. The same issue occurred with killing Gromp (also 4 CS). I would get at least 1 stack for killing krug camp. This bug makes the rune nigh unusable for junglers that are better suited to the blue side of the jungle, and silly for ones that prefer red side.