Jungle creeps not attacking Fizz

As Fizz i can use Playful/Trickster and use Zhonias Hourglass while i'm in the air. When stasis is finished the jungle creeps will not attack me. That means i can kill the jungle creeps with any amount of health. I can go to other camps and kill them and they won't attack me. The jungle creeps won't attack me as long as i don't use Playful/Trickster again. This Works on all monsters except Baron Nashor and the Dragon. I've tried this 6 times and it has worked every time.