Xin fog of war bug

In case riot is unaware. There is a serious problem with xin. Over multiple game lately i have been spamming zed and have started top right nexus. As usual, im aggresive and have been forcing under tower always. I don't play xin so excuse my lack of knowledge about him but ive been seeing a lot of xin jg but something that keeps happening. Multiple times I will catch xin doing raptors. I will get free vision on him. No wards, no nothing. Just free vision. Why? Because apparently when Xin uses his new swing then stab move and the radius just happens to be a slightly over the wall, it will reveal him. I dont know if this is somethung riot knows and doesnt care for but i honestly don't believe it is fair. I shouldnt get free vision for his ability just barely going over the wall. It really isn't fair. Its an ez first blood, plus you might steal his double buffs. I get it. You dont want to nerf all of the broken shit, but at least make sure the things that make simple champions have a disadvantage for just doing an ability are not there