Monster Camps bug. MAJOR!

I discovered a bug where the monster camps won't attack you if you teleport into them from behind. Blue buff, red buff, dragon, even baron. Although I've had a rather difficult time recreating it with the newly updated wraiths and wolves. Didnt try double golems, but I digress.

I was able to take down Baron with only a rabadons, half full RotA, and regular boots... As Kassadin. I was around level 11 or so if i recall correctly. And baron just sat there taking it until it died.

EDIT: Most of the time they really just dont attack at all. No special teleports required.