Kalstia and hurricane bug on twisted tree line

so i noticed on twisted tree line as kalstia if i bought hurricane and then went to the wraiths on the bottom left of the map if i stood below then close to the wall and almost in the lane right at the entrance to the jungle and auto attacked the big wraith the smaller ones would run towards me and once they got within melee range they would stop taking damage from the hurricane even thou the big wraith still took damage. this was the only camp i found to do this and it would only happen with the wraiths if i stood in a certain spot if i stood right in front of the camp before starting it there was no problem. i didn't get a chance to test it with other champions so idk if its a kalstia with hurricane bug or just a hurricane bug. sorry for no video. but i did test ti several times during the match they definitely dont take damage.