[Gameplay] sol and anivia's skills vs Kass's q
So I noticed that Kass Q cancels the sol's W. Is it intended that kass q can interrupted the spell casting? But at the same time, I noticed that kass q does not interrupt anivia's ult. Shouldnt it also cancel ani's ult if it interrupts sol's w? It came to me quite annoying whenever i play those champs against kass. Is this a bug?