Lee Sin Glitching Through Wall

Hi, yes, I know I'm posting a lot, but this a bug that's been screwing me up a lot. When I go for a level 2 invade on a Lee Sin, he slowly glides through the upper wall of blue buff into the wolf pit and then appears where he was. On red side, he glides through the bottom wall of red buff, goes through the brush, then appears to where he was. This is the only champ. that does this and it's very confusing for me and it throws me off. It only happens the FIRST time I go into his jungle when he is there and it doesn't happen after that. I'm not sure if it only happens when playing Nidalee because I don't recall seeing it with other junglers due to the fact that I play Nidalee so much. It's a bug that somewhat gives an unfair advantage that lets you know if the Lee is there or not. I hope a Riot can resolve this issue. :)