There is a bug that happent first time a few months ago, he bought Veigar, I think, he had about 2000 IP and when purchase has been finished he had both Veigar and that 2000 IP. When he tried to buy Argument Chatch for Kata ( or Ekko or Ashe, I don't really know) he didn't had enough IP. This bug happened to me few times. I wil add video about the bug and update this Post if I catch bug with my camera. And I know that Riot is working very hard to release new client and improve League expirience. Thank for your replys.