Master Yi can't be charmed during his ultimate
Like the title says; I just witnessed this multiple times in a match. As well, he's also immune to stuns?? His ult is only supposed to make him immune to slows, not being immobilized or losing control of his character.
Please investigate, update, change this. Whatever has to be done, do it... it's not working the way his tooltip reads. If he's supposed to be immune to all forms of CC, minus silence, then just make it that way. Otherwise, he's not functioning the way he should be. Evelynn's charm and Veigar's stun have no affects on him.