Anivia R's cancel by ahri charm

"After Glacial Storm has been active for at least 1 second, Anivia can cast the ability again to deactivate it, dealing one last tick of damage. The ability will deactivate automatically if she gets too far away or runs out of mana. Additionally, Glacial Storm is deactivated by all forms of Silence icon interrupting crowd control, excluding Fear icon flee, Taunt icon taunt and Charm icon charm."

This is what I checked on some site where as I recalled that anivia ult is designed to not cancelled by charm . But somehow after 7.6, I find that ahri charm can cancel anivia ult. I don't know that whether it is intended or not. I suspect that is due to hard coding to solve ahri charm's bug. I would be happy to recieve explanation.