Gameplay tristana's gun glitch

As I was playing ranked yesterday I noticed something wrong with the riot girl tristana where after she is down walking to her position she slams her gun in her face its not a game breaking bug nor does it help but its quite funny when trying to recall she does the animation of standing on her gun but it instead disappears and her gun is in her hand again slammed across her face not a major issue like I said before but quite funny I don't know if its for other skins also haven't had time to check