Xerath bug Basic/Auto Attacks

Just played a game vs doom bots (lvl 2), I couldn't use my basic attacks as {{champion:101}} on anything, tried attack move etc... nothing worked don't know if it's just me but well... I tried a custom game and recorded, see for yourself : https://www.youtube.com/watch?v=c3xGy1oUxo8&feature=youtu.be You could see that is like he's trying to do it cause he stops whenever he will do an AA but he doesn't make it.
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