[GAMEPLAY] Problem with Volibear jungle clear

I was playing Volibear jungle when I noticed some kind of bug. When you start a jungle camp with majestic roar (E) you can´t deal damage with your auto attacks to the camp while the monsters are feared.

To try to reply the bug you need to:

(1) go with to a jungle camp (2) use majestic roar (E) to start the camp. (3) try to auto attack the monsters in the camp. (the auto attacks won´t deal damage while monsters are feared)

some printscreens:

https://www.dropbox.com/sh/gbdsfugq1rub8lf/AADxhHQa65GPUjhl7iFzdvaQa?dl=0