Lux ult uninterruptible

Its not a channeled ability.

I get pretty salty when I stun a Lux mid-ult and it still goes through, but apparently it is intended. The animation isn't tied to a channel the way Vel'koz's ult is, as an easy example. Stunning a Morgana on Q-cast shouldn't stop her projectile, and Lux's animation really boils down to being just a big, instant-hit projectile (let's briefly ignore Yasuo mains for this part).

Long animation, instant cast is the tl;dr.